I used Cascade 220, worsted weight and a size 5 needle.
Pattern:
Cast on 32 stitches
Knit 12 rows
Bind off 12 stitches and knit to the end of the row
Bind off 12 stitches and knit remaining 8 stitches
Continue knitting 8 stitches for 24 rows
Bind off
Sew together according to diagram (click to enlarge). Using one long piece of yarn, first sew A sides together, then sew all three layers at the toe (B), last sew up sides C. Weave in ends and turn your work right side out.
Sew on 3/4″ button