In my post for the Monkey socks, I mentioned that I used an Eye of Partridge Heel and a round toe instead of the ones given in the instructions. The following instructions are for a total of 64 stitches, which works out to usually a six inch sock circumference at a gauge of eight stitches per inch. BTW, the instructions are adapted from Charlene Schurch's book.
Eye of Partridge Heel with Seed Stitch Edging
Rows 1 and 3 (WS): K1, P1, purl to last 3 sts, K1, P1, K1
Row 2: K1, P1, K1, *K1, sl 1, rep from * to last 3 sts, K1, P1, K1
Row 4: K1, P1, K1, *sl 1, K1, rep from * to last 3 sts, K1, P1, K1
Rep rows 1-4 until you have 32 heel-flap rows; last row should be RS row
Row 1: (WS): S1, P16, P2tog, P1, turn.
Row 2: Sl 1, K3, ssk, K1, turn. Note that there will be a small gap between working sts taht form heel turn and unworked heel sts.
Row 3: Sl 1, purl to within 1 st of gap, P2tog (1 st on either side of gap), P1, turn.
Row 4: Sl 1, knit to within 1 st of gap, ssk, K1, turn.
Rep rows 3 and 4, inc 1 additional knit or purl st after sl 1 until all side sts are worked, end with RS row. There are 18 sts left on heel flap.
Needle 1: heel sts. Needle 2: instep sts.
NOTE: It will get tight here transferring stsm, so you might want to have a cable needle or spare needle ready to help transfer the sts.
With RS facing you and needle 1, PU and knit 16 sts from side of heel flap, PU and knit 2 sts at the top of gusset. Continue with needle 1, PM, K16 instep sts from needle 2.
Needle 2: work rem of instep sts, PM, PU and knit 2 sts at top of gusset, PU and knit 16 sts from side of heel flap, K11 sts from needle 1.
Sts per needle: 43, 43. Needle wsnow hold left and right sides of socks.
Close Gusset Top
Needle 1: Knit to 2 sts before marker, ssk, SM, work est patt to end.
Needle 2: Work est patt to marker, Sm, k2tog, knit to end.
Needle 1: Knit to 3 sts before marker, K2tog, K1, SM, work est patt.
Needle 2: Work est patt to marker, SM, K1, ssk, knit to end.
Work in est patterns.
Work Rnds 1 and 2 until you have 32 sts on each needle, 64 total.