pack includes 6 pairs of socks rib-knit cuffs arch support size 0-6m = 19-27 height, 7-17 lbs. weight size 6-12m = 27-29 height, 17-22 lbs. weight size 12-24m = 29-33 height, 22-30 lbs. weight size 2t-3t, height 33-39, weight 30-36 lbs. size 4t-5t = 39-45, 36-46 lbs. weightmachine wash according to the care instruction label .