Free Knit Cardigan Pattern: Sugar Frost Knit Cardigan by Marly Bird

If you’ve been craving a classic knit cardigan that feels cozy, looks polished, and instantly upgrades your everyday outfits… say hello to Sugar Frost. This pattern has that “throw-it-on-and-feel-put-together” magic ✨—with just the right mix of comfy + cute.

Affiliate Disclosure: This post contains affiliate links. To learn more please visit my privacy policy here💖

You can follow the free pattern right here in this blog post, and if you want the printable, ad-free PDF (aka “no scrolling, no distractions, all the cozy”), you’ll be able to grab that too.

💡 Designer Tip 💡: Cardigans are basically wearable confidence. Knit one in a neutral you’ll live in… and then promptly cast on another in a color that makes you feel like a snack. That’s just science.

Get the Ad-Free, Printable PDF 💖

Want to knit Sugar Frost without the pop-ups and scrolling?

What Makes the Sugar Frost Cardigan Special ✨

Sugar Frost hits that sweet spot between cozy comfort and polished style. The cardigan is worked flat in pieces and seamed, giving it structure that holds its shape beautifully over time.

The clean edges, simple stitch patterns, and optional button details make this a cardigan that feels timeless — not trendy — which means it’ll stay in your wardrobe rotation for years to come.

Sizing, Fit Notes, Yarn & Gauge 📏🧶

Cardigans are wonderfully forgiving when you choose your size intentionally.

Here’s how I recommend approaching fit:

• Measure your full bust (or upper bust for a more tailored shoulder fit)
• Decide how you want it to wear:
– Closer fit: less ease
– Everyday layering fit: moderate ease
– Cozy, relaxed fit: more ease

✨ Designer Tip: If you’re between sizes, think about the sleeves first. Most “I wish I’d sized differently” regrets show up in the arms.

Yarn Selection & Substitutions

Great cardigan yarns usually share a few traits:

• Soft (because itchy is rude)
• Nice drape
• Clear stitch definition

When swapping yarns for this pattern, try to match:

1. Yarn weight
2. Gauge (this is the boss)
3. Fiber behavior (wooly bounce vs. drapey blends)
   • Don’t forget to always block your swatch so you know how the yarn will act once it is in the pattern stitch or after is has some weight added to it!

Some alternative yarns that would be nice for this design include:
🧶 Knit Picks Heatherley Worsted
🧶 Knit Picks Shine Worsted
🧶 Knit Picks Woolen Cotton Yarn
🧶 Berroco Remix
🧶 Caron Cotton Cakes

✨ Designer Tip: If a cardigan is meant to drape, don’t muscle the fabric with too-small needles. Let the yarn do its thing. Drape is a vibe.

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Skills You’ll Use (and Video Help) 🎥

If you can knit and purl, you’re already on your way 🙌
Here are a few quick tutorial links you might love as you stitch:

• Knit: https://youtu.be/nkzVGuaKsR8
• Purl: https://youtu.be/TsPqLvRmOow
• SSK: https://youtu.be/sjT0hKT55D8?t=1074
• K2tog: https://youtu.be/JrHqDYb2ss8?t=346
• Add a Lifeline: https://youtu.be/FiqYUE_oHAw
• UnKnit / Tink: https://youtu.be/c7Gud7k4Y8k
• Seaming: https://youtube.com/live/tjBzj-j_SJ4

Blocking: The Glow-Up Step ✨🫧

Blocking is what takes your cardigan from “cute off the needles” to “WHOA I made that?!”

My favorite deep-dive blocking post is right here (bookmark it—you’ll use it forever):
https://marlybird.com/blog/steam-blocking-vs-wet-blocking-superwash-yarn-prism-make-along-part-10/

💡 Designer Tip 💡: Always block your swatch the same way you’ll block your finished cardigan. Pre-block gauge and post-block gauge can be very different, and nobody wants a surprise crop-top cardigan situation.

Styling Ideas: How to Wear Sugar Frost 👗👖

This cardigan is basically your closet’s best friend. Try it:

• Over a tank + high-waisted jeans (effortless, cute, done)
• With a tee + leggings for cozy errands
• Layered over a simple dress to make it office-friendly
• With boots + a long necklace for that “I totally planned this outfit” energy 😏

I asked ChatGPT to do some mockups of these looks and here is what it came up with for me. It is strange how it changes my face a bit and that is totally NOT my body but the overall looks are not bad. I really like the boots and long necklace!

Free Sugar Frost Knit Cardigan Pattern Details 🧶❄️

Skill Level Intermediate

Sizes

XS (S, M, L, XL, 2X, 3X, 4X, 5X)

Finished Measurements

Bust 32¼ (36¼, 40¼, 44¼, 48¼, 52¼, 56¼, 60¼, 64¼)” / 82 (92, 102, 112.5, 122.5, 132.5, 143, 153, 163) cm including button band

Length 21¾ (22¼, 22¾, 23½, 24, 24¾ , 25¼, 26, 26½)” / 55 (56.5, 58, 59.5, 61, 63, 64, 66, 67.5) cm

Gauge

20 sts and 26 rows = 4″ / 10 cm in Stockinette st (knit on RS, purl on WS).

Materials

Yarn Berroco, Modern Cotton (60% Pima cotton/ 40% modal rayon, 209 yds / 191 m, 3.5 oz / 100 g CYCA #4 worsted) 5 (5, 6, 6, 7, 8, 9, 9, 10) hanks: Gadwall

Needles 36″ (91 cm) or longer size US 7 (4.5mm) or size required for Stockinette st gauge, same length circular needle two sizes size smaller for ribbed edges

Notions 

• Stitch Markers (two different colors or designs)
• Tapestry Needle
• Scissors
• Tape Measure
• Leather tags (Optional)
• Leather rivets (Optional)
• Secura Activated sewing needle and thread of matching color
• 7 (7, 7, 7, 8, 8, 7, 7, 7) backing buttons
• 7 (7, 7, 7, 8, 8, 7, 7, 7) buttons ½” / 1.25 cm in diameter(shank buttons best)
• Blocking Squares
• Blocking Pins
• Soaking Basin
• Eucalan Wool Wash
• Blocking Wires (ideal for lace work)
• Ball Winder and Swift (great for yarn that comes in hanks)

Special Stitches

⭐️ Star – Knit the next 3 sts together but keep them on the left needle (do not slip them off). Yarn over, knit those same 3 sts again, then slip them off the left needle.

⭐️ BLStar (back-loop star) – Slip the next 3 sts knitwise, one at a time onto the right needle. Insert left needle in fronts of all 3 sts, and knit them together through the back loop, but keep them on the left needle (do not slip them off). Yarn over, knit those same 3 sts through the back loop again, then lip them off the left needle.

⭐️ 3to5 (3 to 5 st increase) – Knit the next 3 sts together but keep them on the left needle (do not slip them off). [Yarn over, knit those same 3 sts again] twice, then slip them off the left needle – 5 sts created.

⭐️ BL3to5 (back loop 3 to 5 st increase) – Slip the next 3 sts knitwise, one at a time onto the right needle. Insert left needle in fronts of all 3 sts, and knit them together through the back loop, but keep them on the left needle (do not slip them off). [Yarn over, knit those same 3 sts through the back loop again] twice, then lip them off the left needle – 5 sts created.

⭐️ Ssk (Slip, Slip, Knit) Slip 2 stitches, one at a time, as if to knit. Insert left hand needle into the front of these two stitches and knit them together from this position (1 stitch decreased)

Stitch Patterns

Twisted Rib Worked over an odd number of sts. Work through back loops only for all sts.

Row 1 (WS): P2, * k1, p1; rep from * to last st, p1.

Row 2: K2, * p1, k1; rep from * to last st, k1.

Rep Rows 1 and 2 for Twisted Rib.

Star Stitch Panel Worked over 7 sts.

Row 1 (RS): Knit.

Row 2: Purl.

Row 3: Star, k1, BLStar.

Row 4: Purl.

Rep Rows 1-4 for Star Stitch Panel.

Schematic

Notes

• Directions are for size XS; changes for sizes S, M, L, XL, 2X, 3X, 4X, 5X are in parentheses. When only one number is given then that number applies to all sizes.
• Cardigan is worked from the top down in one piece, except for the pockets, which are knit separately and sewn on.
• Sleeves of cardigan are knit flat then seamed in the finishing.
• Cardigan is a summer wearable that pairs perfectly with tank tops or summer dresses. The fit is close-fitting with 0-2″ of ease in the bust.
• Measure your gauge on a blocked swatch!

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I’m thrilled to share this amazing pattern with you, many patterns on my blog are absolutely free! I kindly request that you don’t copy and paste or distribute this pattern. Prefer an ad-free experience? Buy a digital PDF pattern for a small fee from one of my online stores for a seamless crafting journey. 

I appreciate your support and readership. You are the reason I can keep doing what I love and sharing it with others. So, thank you from the bottom of my yarn-loving heart! Disclosure: This post contains affiliate links, meaning I get a commission if you decide to make a purchase through my links at no cost to you.

Sugar Frost Knit Cardigan Pattern Instructions

Neck

Using smaller circular needles, cast on 85 (89, 93, 97, 109, 113, 121, 129, 133) sts and work in Twisted Rib for 5 rows.

Shape Yoke

Counting from either end of row, place 4 markers to mark the raglan increases as follows:

Mark st #14 (16, 18, 20, 23, 25, 26, 28, 30), st #30 (30, 30, 30, 33, 33, 36, 38, 38), st #56 (60, 64, 68, 77, 81, 86, 92, 96), and st #72 (74, 76, 78, 87, 89, 96, 102, 104), which is st #14 (16, 18, 20, 23, 25, 26, 28, 30) counting from the other end.

The two outermost marked sections will become the Fronts, the center marked section will become the Back, and the second and fourth marked sections will become the Sleeves.

Change to larger needles.

Next 4 rows:

Row 1 (RS): Knit.

Row 2: Purl.

Row 3 (inc row, adds 16 sts): * Knit to 3 sts before marked st, 3to5, knit marked st, BL3to5, rep from * 3 more times, knit to end –

15 (17, 19, 21, 24, 26, 27, 29, 31) sts in each Front section,

29 (33, 37, 41, 47, 51, 53, 57, 61) sts in Back section,

19 (17, 15, 13, 13, 11, 13, 13, 11) sts in each Sleeve section,

4 marked raglan sts,

101 (105, 109, 113, 125, 129, 137, 145, 149) total sts.

Row 4: Purl.

Rep these 4 rows 7 (8, 10, 11, 13, 14, 15, 16, 17) more times –

29 (33, 39, 43, 50, 54, 57, 61, 65) sts in each Front section,

57 (65, 77, 85, 99, 107, 113, 121, 129) sts in Back section,

47 (49, 55, 57, 65, 67, 73, 77, 79) sts in each Sleeve section,

4, marked raglan sts,

213 (233, 269, 289, 333, 353, 377, 401, 421) total sts.

Place a marker of a different color or design from the raglan markers in the center st of each Sleeve section (the second and fourth sections on the needle).

Next 4 rows:

Row 1 (RS): Knit.

Row 2: Purl.

Row 3 (inc row, adds 8 sts): * Knit to 3 sts before marked raglan st, 3to5, knit marked st, BLStar, knit to 3 sts before marked Sleeve center st, Star, knit marked st, BLStar, knit to 3 sts before marked raglan st, Star, knit marked st, BL3to5 rep from * once more, knit to end –

31 (35, 41, 45, 52, 56, 59, 63, 67) sts in each Front section,

61 (69, 81, 89, 103, 111, 117, 125, 133) sts in Back section,

47 (49, 55, 57, 65, 67, 73, 77, 79) sts in each Sleeve section,

4 marked raglan sts,

221 (241, 277, 297, 341, 361, 385, 409, 429) total sts.

Row 4: Purl.

Rep these 4 rows 3 (3, 2, 2, 1, 1, 1, 1, 1) more times –

37 (41, 45, 49, 54, 58, 61, 65, 69) sts in each Front section,

73 (81, 89, 97, 107, 115, 121, 129, 137) sts in Back section,

47 (49, 55, 57, 65, 67, 73, 77, 79) sts in each Sleeve section,

4 marked raglan sts,

245 (265, 293, 313, 349, 369, 393, 417, 437) sts.

Separate for Body and Sleeves

Next 2 rows:

Row 1 (RS): * Knit to marked st, remove marker, k1 (this was the marked st), place all Sleeve sts (all sts to next marked raglan st) on a holder or spare circular needle, cast on 6 (8, 10, 12, 12, 14, 18, 20, 22) sts, remove marker, k1 (this was the marked st); rep from * once more, knit to end – 163 (183, 203, 223, 243, 263, 283, 303, 323) sts.

Row 2: Purl.

Body

Continue evenly in Stockinette st until Body measures 12″ / 30.5 cm in length, ending after a RS (knit) row.

Change to smaller needle and work in Twisted Rib for 1½” / 4 cm.

Sleeves

(Make Both the Same) and the sleeves are worked flat!

With RS facing and using larger circular needle, pick up and knit 3 (4, 5, 6, 6, 7, 9, 10, 11) sts from center of underarm towards Sleeve sts, knit across 47 (49, 55, 57, 65, 67, 73, 77, 79) Sleeve sts, then pick up and knit 3 (4, 5, 6, 6, 7, 9, 10, 11) more sts from remaining underarm edge – 53 (57, 65, 69, 77, 81, 91, 97, 101) sts.

Continue in established Star Stitch Panel at center of Sleeve. At the same time shape Sleeve as follows:

Next Row (dec row, RS): K2, k2tog, work as established to last 4 sts, ssk, k2 – 51 (55, 63, 67, 75, 79, 89, 95, 99) sts.

Rep this dec row every 12 (12, 8, 4, 4, 4, 4, 4, 4) rows 1 (5, 9, 2, 10, 11, 19, 23, 23) more times – 49 (45, 45, 63, 55, 57, 51, 49, 53) sts.

Then rep this dec row every 16 (16, 12, 8, 8, 8, 8, 0, 0) rows 4 (1, 1, 10, 6, 6, 2, 0, 0) times – 41 (43, 43, 43, 43, 45, 47, 48, 53) sts.

Continue in Stockinette st and Star Stitch Panel until Sleeve measures 14 (14, 14½, 14½, 15, 15, 15, 15½, 15½)”, ending after a RS row.

Change to smaller needle and work in Twisted Rib for 1½” (4 cm).

Pockets (Optional)

(Make Both the Same)

Note: Pocket is triangular in shape and seamed on the right side of the sweater. 

Using larger needle, cast on 11 sts, and mark the center st.

Row 1 (WS): Purl.

Row 2: Knit.

Row 3: Purl.

Row 4: Knit to last 3 sts before center st, 3to5, knit marked st, BL3to5, knit to end – 15 sts.

Rep Rows 1-4 6 more times, then purl one more row –39 sts.

Change to smaller needle and work 3 rows in Twisted Rib.

Use larger needle to bind off all sts.

Finishing

Block pieces to measurements (optional).

Buttonhole Band

Using smaller circular needles and with RS facing, pick up and knit 110 (110, 114, 118, 122, 122, 126, 130, 134) sts up Right Front edge.

Working through the back loop only:

Rows 1-3 (beg WS): * K1, p1; rep from * to end.

Row 4 (buttonhole row, RS): K1, p1, k1, * yo, k2tog, [p1, k1] 7 (7, 7, 7, 7, 7, 9, 9, 9) times; rep from * 5 (5, 5, 5, 6, 6, 5, 5, 5) more times, yo, k2tog, p1, [k2, p1] 4 (4, 6, 8, 0, 0, 0, 2, 4) times.

Rows 5-8: Rep Row 1 four times.

Bind off all sts loosely in established rib pattern.

Button Band

Using smaller circular needles and with RS facing, pick up and knit 110 (110, 114, 118, 122, 122, 126, 130, 134) sts down Left Front edge.

Rows 1-8 (beg WS): * K1, p1; rep from * to end.

Bind off all sts loosely in established rib pattern.

Sew buttons to purl sections of ribbing opposite buttonholes.

Sew Pockets (Optional)

Pin cast-on edge of pocket to Right Front, approx 1″ / 2.5 cm above bottom ribbing, and 1″ / 2.5 cm away from front edge ribbing.

Rotate and align pocket so that one long edge is parallel to the bottom ribbing.

Pin down flat, and sew long edges and cast-on edge of Pocket to Right Front.

Sew other Pocket to Left Front the same way.

Sew sleeve seams.

Weave in all loose ends.

FAQs ❓

Is the Sugar Frost Knit Cardigan pattern beginner-friendly?
Sugar Frost is best suited for intermediate knitters, mainly because of shaping, seaming, and finishing. That said, confident beginners who have knit a garment before — or who enjoy learning new skills — can absolutely tackle it with patience and the included video support.

Is this a top-down or bottom-up cardigan?
Sugar Frost is worked flat in one piece and seamed at the sleeves. This construction gives the cardigan structure and a polished fit that holds its shape beautifully over time.

Does this knit cardigan pattern include video tutorials?
Sort of…while the written pattern walks you through each step, there are also helpful video tutorials available for key techniques like decreases, lifelines, and seaming.

Can I knit this cardigan without adding buttons?
Absolutely. Buttons are optional, so you can wear Sugar Frost open and relaxed or add buttons for a more classic, finished look. Both styles work beautifully. Or, choose a zipper to make it a different type of fit.

What yarn weight is best for the Sugar Frost Cardigan?
The pattern is written for a worsted/aran-weight yarn, which provides warmth, structure, and great stitch definition. When substituting yarn, matching gauge is the most important factor.

Can I use acrylic or budget-friendly yarn for this cardigan?
Yes! A quality acrylic or acrylic blend can work well, especially if you want easy care and washability. Just make sure your swatch meets gauge after blocking to ensure the fit stays on track.

Knit Picks Heatherly would be a great option for this cardigan!

Does this cardigan stretch out with wear?
With proper yarn choice and blocking, Sugar Frost holds its shape nicely. This is made with a cotton yarn and I planned accordingly by working up a gauge swatch and washing and blocking that swatch to take all measurements. I even simulated gravity by adding clothes pins to the bottom of my swatch after it was dry to see if it stretched more (it didn’t)

How long does it take to knit the Sugar Frost Cardigan?
That depends on your knitting speed and available time. Many knitters enjoy working on this cardigan over a few weeks as a relaxing, steady project rather than a quick weekend make.

Is this a good cardigan pattern for everyday wear?
Yes — and that’s one of the best things about it. Sugar Frost is designed to be comfortable, wearable, and practical, making it perfect for daily outfits, casual layering, and work-from-home cozy days.

Can I adjust the length of the body or sleeves?
Yes! As with most classic cardigans, you can customize the length if you are familiar with sweater construction. Just be sure to account for yardage and check proportions as you go.

Do I need special tools or equipment to knit this cardigan?
No special tools required. Standard knitting needles, stitch markers, stitch holders or waste yarn, and a tapestry needle for finishing are all you need.

Is the free version different from the paid PDF?
The pattern content is the same. The paid PDF is simply a printable, ad-free format that’s easier to save, print, and knit from offline.

What skill level should I be comfortable with before starting?
You should feel comfortable with:

• Knit and purl stitches
• Basic decreases
• Reading shaping instructions
• Simple finishing and seaming

If those sound manageable, you’re ready to knit Sugar Frost.

Can I gift a finished Sugar Frost Cardigan?
Yes — this pattern makes a fantastic handmade gift. Just be sure to swatch carefully and choose a yarn the recipient will enjoy wearing and caring for.

Final Thoughts 💖

Sugar Frost is the kind of cardigan that earns its spot on the “favorite handmade things” list real fast. It’s cozy, flattering, and endlessly wearable—which means you’ll finish it and immediately start plotting version #2. (Totally normal. Completely encouraged.)

When you share yours, tag me @themarlybird and use #mmmdi and #marlybird so I can squeal over your cardigan with you! 🥰🧶

❤️ Your BiCrafty Bestie,
Marly Bird