Sizes 2 or 4 years require 1 ounce per pair. Size 6 years calls for 2 ounces but 3 ounces will make 2 pair. The six year size is knit on US 2 needles.

Length of foot is 5 1/2 (6 1/2, 7 1/2) inches, respectively for sizes 2 (4, 6) years.
Length of leg to bottom of heel flap is 6 1/2 (7, 7 1/2) inches.

Ankle socks with cuff turned over have a length of leg to bottom of heel of 3 1/2 (3 1/2, 3 3/4) inches.