Size 34
1st round of decrease: *9 double half double crochets, 2 double half double crochets together*, repeat *-* 3 more times = 40 double half double crochets. Work 1 even round.
2nd round of decrease: *3 double half double crochets, 2 double half double crochets together*, repeat *-* 7 more times = 32 double half double crochets.
3rd round of decrease: *2 double half double crochets, 2 double half double crochets together*, repeat *-* 7 more times = 24 double half double crochets.
4th round of decrease: *1 half double double crochet, 2 half double double crochets together*, repeat *-* 7 more times = 16 half double double crochets.
5th round of decrease: 2 threads together, repeat until the end of the round = 8 threads. Break the thread. Pass the thread through the remaining stitches, close the hole and knit.
Size 38/39
1st round of decrease: *4 double half double crochets, 2 double half double crochets together*, repeat *-* 7 more times = 40 double half double crochets. Work 1 round even.
2nd round of decrease: *3 double half double crochets, 2 double half double crochets together*, repeat *-* 7 more times = 32 double half double crochets. Work 1 round even.
3rd round of decrease: *2 double half double crochets, 2 double half double crochets together*, repeat *-* 7 more times = 24 double half double crochets.
4th round of decrease: *1 half double double crochet, 2 half double double crochets together*, repeat *-* 7 more times = 16 half double double crochets.
5th round of decrease: 2 threads together, repeat until the end of the round = 8 threads. Break the thread. Pass the yarn through the remaining stitches, close the hole and knit. Work the other sock in the same way.