Comfy Socks Crochet Pattern Using Back Loop Slip Stitches

If you’ve been searching for a crochet sock pattern that actually feels good to wear, holds its shape, and doesn’t take forever to figure out, you’ve landed in the right place. This comfy socks crochet pattern using back loop slip stitches is one of those projects that looks impressive on the finished product but stays surprisingly approachable throughout the process. The back loop slip stitch technique creates a dense, fabric-like texture that mimics the feel of a knitted sock — stretchy, snug, and soft against your skin.

Whether you’re a beginner who has mastered basic stitches or an intermediate crocheter looking for a satisfying everyday project, this pattern will walk you through everything from yarn selection to the final bind-off. Let’s dive in.

Why Back Loop Slip Stitches Make the Best Crochet Socks

Most crochet socks fail for one simple reason: they’re too stiff. Standard single crochet creates a dense, inflexible fabric that doesn’t flex with your foot the way a sock needs to. Double crochet opens up the fabric too much, leaving gaps that collect fuzz from your shoes and let your socks lose their shape after a single wash.

The back loop slip stitch solves both problems elegantly. When you work a slip stitch into only the back loop of each stitch, you create a horizontal ridge on the right side of the fabric — almost identical to the garter stitch ribs you’d get from knitting. More importantly, the resulting fabric has natural stretch in both directions. It hugs the foot, moves with each step, and bounces back to shape after washing.

There’s also a speed advantage. Slip stitches are the fastest stitch in crochet. Once you get your tension comfortable and your rhythm going, these socks work up much faster than you might expect. Many crocheters finish an adult-sized sock in a single long evening.

Materials You’ll Need

Before you start, gather everything on this list. Having it all within reach before you begin makes the process smoother and helps you avoid stopping mid-row to hunt down a tapestry needle.

Yarn: The best yarn for this pattern is a fingering weight or sock weight yarn, typically labeled as “sport” or “fingering” and measuring around 400–450 yards per 100-gram skein. Look for a blend that contains at least 20% nylon or polyamide alongside merino wool or another soft fiber. Pure wool socks wear through at the heel quickly — nylon adds durability without sacrificing comfort. A 75% superwash merino / 25% nylon blend is the gold standard for handmade socks. For adult socks, plan to use approximately 350–400 yards per pair for a women’s medium and 400–450 yards for a men’s medium.

Hook: Use a 2.0mm or 2.25mm steel crochet hook. This is smaller than what most crocheters are accustomed to, and that’s intentional. Socks need a tight gauge to hold their shape and prevent holes from forming at stress points. If you typically crochet loosely, start with the 2.0mm. If you tend to crochet tightly, the 2.25mm will give you a little more ease.

Other supplies: a locking stitch marker or two, a tapestry needle for weaving in ends, scissors, and a tape measure. A sock blocker is optional but genuinely useful for shaping the finished socks before gifting them.

Gauge

Getting gauge right is more important for socks than for almost any other crochet project. A sock that’s even a little too loose will slide around inside your shoe. One that’s too tight will be uncomfortable and may not fit over your heel at all.

Work a gauge swatch before you begin. Chain 20 and work back loop slip stitches for 20 rows. Block the swatch lightly by dampening it and laying it flat. Measure the center of the swatch.

The target gauge for this pattern is 32 stitches and 36 rows = 4 inches (10 cm) in back loop slip stitch.

If your gauge is too loose (fewer stitches per inch), go down a hook size. If your gauge is too tight (more stitches per inch), go up a hook size. Don’t skip this step — socks worked at the wrong gauge won’t fit, and that’s a disappointing way to end a project you’ve invested hours into.

Sizing

This pattern is written for the following sizes:

Women’s Small (US shoe size 5–6.5) — foot circumference approximately 7.5 inches
Women’s Medium (US shoe size 7–9) — foot circumference approximately 8 inches
Women’s Large / Men’s Small (US shoe size 9.5–11) — foot circumference approximately 8.75 inches
Men’s Medium (US shoe size 11–13) — foot circumference approximately 9.5 inches

Throughout the pattern, instructions are written for Women’s Medium with other sizes in parentheses: Small (Medium, Large/Men’s Small, Men’s Medium).

Understanding the Back Loop Slip Stitch

If you’ve never worked a back loop slip stitch before, take five minutes to practice before starting the actual sock. It feels slightly different from regular slip stitches, and your tension needs a moment to settle.

To work a back loop slip stitch (blss): insert your hook under only the back loop of the indicated stitch — that’s the loop farthest from you as the work faces you. Yarn over and pull through both the back loop and the loop already on your hook in one motion. That’s it. One loop on your hook, one stitch complete.

The key to an even fabric is keeping your tension consistent. The stitches should feel snug but not strangled. If you’re fighting to pull the yarn through, loosen up slightly. If the fabric looks loose and loopy, tighten your grip on the yarn.

The Pattern: Cuff-Down Construction

This pattern is worked cuff-down, which means you start at the ankle and work toward the toe. Many crocheters find this method intuitive because the cuff gives you a firm foundation to work from, and you can try the sock on as you go to check the foot length before finishing.

Cuff

Chain 60 (64, 70, 76). Being careful not to twist the chain, slip stitch into the first chain to form a ring.

Place a stitch marker at the join to mark the beginning of the round. Move this marker up as you complete each round.

Round 1: Chain 1 (this chain does not count as a stitch throughout the pattern). Work 1 blss into each chain around. Slip stitch into the first blss to close the round. — 60 (64, 70, 76) sts.

Rounds 2–20: Chain 1, work 1 blss into each stitch around. Slip stitch to join. — 60 (64, 70, 76) sts.

After 20 rounds, your cuff should measure approximately 2 to 2.25 inches tall. If you prefer a taller cuff — say, for a crew sock rather than an ankle sock — continue working additional rounds until the cuff reaches your desired height. Each additional 8 or 9 rounds adds roughly one inch.

Leg

Continue working in the same manner as the cuff, working back loop slip stitches in the round, until the leg measures 5 (5, 6, 6) inches from the cast-on edge, or your desired leg length. The leg section is the most customizable part of this pattern — shorter for a low ankle sock, longer for a knee sock.

Heel Flap

The heel is worked flat, back and forth in rows, on half of your stitches. Place the other half of your stitches on a holder or stitch marker — these will become the instep.

Heel stitches: 30 (32, 35, 38)
Instep stitches: 30 (32, 35, 38)

Row 1 (RS): Chain 1, work 1 blss into each heel stitch across. Turn. — 30 (32, 35, 38) sts.

Row 2 (WS): Chain 1, work 1 blss into each stitch across. Turn.

Repeat Rows 1 and 2 until the heel flap measures 2 (2, 2.25, 2.5) inches, ending after a WS row. For most sizes, this is approximately 18–22 rows total.

The heel flap creates a reinforced section at the back of the heel — the area that takes the most abrasion inside a shoe. If you’re using a yarn with a lower nylon content, you can work the heel flap with a strand of reinforcing thread held alongside your yarn for extra durability.

Heel Turn

The heel turn shapes the bottom of the heel cup. This section is worked in short rows.

Row 1 (RS): Chain 1, blss across 18 (20, 21, 23) sts. Blss2tog (back loop slip stitch two together — insert hook through back loops of next 2 stitches, yarn over, pull through all loops). Blss 1. Turn. Leave remaining stitches unworked.

Row 2 (WS): Chain 1, blss across 7 (8, 7, 8) sts. Blss2tog. Blss 1. Turn.

Row 3 (RS): Chain 1, blss to 1 stitch before the gap. Blss2tog across the gap. Blss 1. Turn.

Row 4 (WS): Chain 1, blss to 1 stitch before the gap. Blss2tog across the gap. Blss 1. Turn.

Repeat Rows 3 and 4 until all heel stitches have been worked. You should have 18 (20, 21, 23) stitches remaining on the heel.

Gusset

With the right side facing, pick up and work 1 blss in each row end along the right side of the heel flap. Place a marker. Work across the instep stitches in blss. Place a second marker. Pick up and work 1 blss in each row end along the left side of the heel flap. Work across the remaining heel stitches. Join to work in the round.

Total stitch count after pick-up: approximately 78 (84, 91, 99) sts, depending on how many stitches you picked up along the flap edges.

Gusset Decrease Round:
Work blss to 2 stitches before the first marker. Blss2tog. Slip marker. Work across instep in blss. Slip marker. Blss2tog. Work to end of round.

Work one plain round (no decreases) in blss.

Alternate these two rounds — one decrease round, one plain round — until you are back to your original stitch count: 60 (64, 70, 76) sts.

Foot

Continue working in the round in back loop slip stitch until the foot measures approximately 1.75 (1.75, 2, 2) inches shorter than the desired total foot length. The total foot length is measured from the back of the heel to the tip of the longest toe.

For reference, common foot lengths are:
Women’s Small: approximately 8.75 inches
Women’s Medium: approximately 9.5 inches
Women’s Large / Men’s Small: approximately 10.5 inches
Men’s Medium: approximately 11.25 inches

Try the sock on if possible to check the fit before moving to the toe.

Toe

The toe is worked flat with decreases on every other round to create a gradual taper.

Set-up: Divide your stitches so 30 (32, 35, 38) stitches are on the top of the foot (instep) and 30 (32, 35, 38) stitches are on the sole.

Decrease Round:
Instep: Blss2tog at the beginning and end of the instep stitches.
Sole: Blss2tog at the beginning and end of the sole stitches.
Total decrease: 4 stitches decreased per decrease round.

Plain Round: Work 1 blss into each stitch around, no decreases.

Alternate these two rounds until 24 (24, 26, 28) stitches remain. Then work decrease rounds only (no more plain rounds in between) until 12 (12, 14, 14) stitches remain.

Cut yarn, leaving a 12-inch tail. Thread the tail onto your tapestry needle and use a Kitchener stitch or a simple gathered close (run the yarn through all remaining stitches twice, then pull snug) to close the toe. Weave in the end on the inside of the sock.

Finishing

Turn the sock inside out and weave in all remaining ends using your tapestry needle. Work the ends through several stitches in different directions to prevent them from working loose during washing.

Block your socks by soaking them in cool water with a small amount of wool wash for about 10 minutes. Gently squeeze out excess water — never wring — and lay them flat or slip them onto sock blockers. Allow to air dry completely before wearing.

Care Instructions

Socks made from superwash merino and nylon blends are fairly easy to care for compared to other handmade woolens. Machine wash on a gentle or wool cycle in cold water. Lay flat or hang to dry rather than putting them in the dryer, which can felt the fibers over time even with superwash yarns and may cause the nylon to break down faster. With proper care, a pair of handmade socks like these can last for years.

Tips for Getting the Best Results

Keep your beginning chain looser than you think you need to. A tight foundation chain is the most common reason a crochet sock is difficult to get over the heel. If necessary, go up one hook size just for the foundation chain, then switch back down for the body of the cuff.

Count your stitches at the end of every round for the first several rounds. It’s easy to accidentally work into the slip stitch join and add an extra stitch without noticing. Catching this early saves a lot of frogging.

Work both socks at the same time if you can — either by using two separate balls of yarn and working them side by side, or by completing the first and starting the second immediately. Second sock syndrome is real, and having both socks at the same stage throughout the project keeps you motivated to finish.

If you find the back loop slip stitch particularly tight to work, try a slightly different hook hold. Holding the hook like a pencil rather than an overhand grip gives many crocheters more control and comfort for tight stitch work.

Customization Ideas

One of the best things about this pattern is how easy it is to adapt. Once you’ve made a pair as written, here are a few ways to make them your own.

Add a simple stripe by changing color at the beginning of any round. Because back loop slip stitches show clean, horizontal lines, stripes come out beautifully defined — much more crisp than stripes in single crochet.

Work the cuff in a different stitch for contrast texture. A simple ribbed cuff worked in alternating front and back post single crochet, then transitioning into the back loop slip stitch body, creates a polished, professional look.

For a warmer house sock, hold two strands of fingering weight together and go up to a 3.5mm or 4.0mm hook. The resulting fabric is plush and thick — perfect for cold floors in winter but too bulky to fit inside most shoes.

Final Thoughts

There’s something deeply satisfying about wearing socks you made yourself. Every time you slip them on, you’ll notice the way they fit a little differently than store-bought socks — because they’re shaped exactly to your foot, made from yarn you chose, in a technique you took the time to learn.

The back loop slip stitch sock method is one of the most practical crochet techniques you’ll add to your repertoire. Once you’ve worked through this pattern once, you’ll have a reliable, customizable template you can return to again and again — for gifts, for yourself, for everyone in your household who gets curious about those beautiful, handmade socks on your feet.

Cast on your foundation chain, find a comfortable seat, and enjoy the rhythm of the work. Your feet will thank you.