Worsted weight slippers
Size 6 needles

CO 34
3 rows as written
Increase: K 7, (m1, k4) 5 times, m1, k7 (40sts)
9 rows in st st, starting and ending with a purl row.
K15, leave on needle, K25.
P15, leave on needle, P10.
Heel flap: 8 rows A. Sl1, k, (Sl1 as if to purl, k) across.
B. sl1, purl across
Pu 4 st at end of next 2 rows as written.
Work these 18 st as follows:
A. Sl1, k, (Sl1 as if to purl, k) across to last stitch, SSK with 1 st from the 15.
B. sl1, purl to last st, p2tog with 1 st from the 15.
A, B 13 more times. On last two rows, SSSK and P3tog.
Instep:
k9, this is new beginning of round
Needle 1: k9, pu and k 5st. 14 st on 1
Needle 2: pu and k 3 st. Co 10 st with long tail. Pu and k 3 st. 16 st on 2
Needle 3: pu and k 5. K9. 14 st on 3
Instep edging as written
Foot: 17 rounds as written
Toe shaping:
Redistribute as 11, 22, 11
Work decrease rounds as written, CO.

1/20/2013: Edited to add:
17 rounds on the foot is not enough to stretch satisfactorily for my 8.5 size feet. Will add at least an inch next time.