An ingenious design.
Fabulous for straight needle knitters like me, who don’t use dpns. Plus, I never sew any seams. I sl st crochet all seams, WS together, RS facing. Looks beautiful and is quick, easy and flexible.

Designer doesn’t provide gauge, yardage requirements nor dimensions other than length of the foot section. More details would be helpful.

Super bulky with US 10 made a very dense fabric that didn’t stretch much. Started over with US 10 1/2 needles.

Worked 23 rows garter stitch (4”) before the bindoff / ribbing section. The garter stitch section makes the heal and ankle areas and 15 rows didn’t seem like enough.

Worked 22 rows 1x1 ribbing.
Total length of foot bed = 9 1/2”
Ribbing gauge: 16 st, 16 r / 4”

For more rows for either section, more yarn will be needed.
For a bigger size, 7.0 mm or 7.5 mm needles will work, too