Avoiding Heel Flap Gap in Flap and Gusset Sock Heels

Knitting Tutorial: How to prevent heel flap gap in flap and gusset style sock heels.
If you've ever knit a pair of flap and gusset style socks, you know how easy it is to get a noticeable hole or gap at the gusset corners. Many knitters stitch those holes shut when they finish their socks. I do my best to prevent the heel flap gap so there's nothing to fix later on.

Before You Begin

One way to prevent the gusset gaps is to pick up and knit an extra stitch or two, on each side of the sock, between the heel flap and gusset. Unfortunately, that also adds to the circumference of the sock where the ankle meets the foot. It's not a great option for people who have small insteps and don't need extra fabric around their socks.

Instead, you can use a cable needle to pick up two additional stitches in the gaps on each side and decrease them in the same round where you pick up stitches at the sides of the heel flap.


  • Cobasi by HiKoo Yarn
  • addi bamboo FlexiFlips needles
  • cable needle
Thanks to Skacel for providing the yarn and knitting needles used in this tutorial. These products are available locally at many yarn shops and online at Makers' Mercantile.

Avoiding Heel Flap Gap

Recommended Pattern

Ready to try this technique in a pattern? The Riptide Socks Pattern has videos to help you learn more about:
  • Channel Island CO
  • DPN Tips for Tracking Rounds
  • Square Turn Heel
  • Avoiding Heel Flap Gap
  • Spiral Sock Toe
Riptide Socks Knitting Pattern: Learn how to avoid heel flap gap in flap and gusset sock heels

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Knitting Tutorial: How to prevent heel flap gap in flap and gusset style sock heels.

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The Chilly Dog: Avoiding Heel Flap Gap in Flap and Gusset Sock Heels
Avoiding Heel Flap Gap in Flap and Gusset Sock Heels
Learn how to avoid heel flap gap without adding stitches to the circumference of your knit sock.
The Chilly Dog
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