These clear acrylic sock blockers from Hipstrings won’t warp from the moisture, and the cut outs allow for air flow and quicker drying.
Size is based on foot circumference, but also takes into count foot length, arch, and ankle circumstance. They can block up to 8″ of calf. The blockers are sized for 90% of actual foot measurement to allow for a perfectly blocked sock that will fit snug and comfy on your foot.
The 8″ corresponds to a Women’s Shoe Size 6-9 or Men’s 4-7.
The 9″ corresponds to a Women’s Shoe Size 8-12 or Men’s 6-10.
The 10″ corresponds to a Men’s Shoe size 10.5-14.