Designed this to hold socks together as a pair through the washer and dryer. I hate unmatched socks.

A similar item is commercially available but they are usually thinner and smaller, intended for thin dress socks. This will hold gym socks or crew socks.

One has an added rim for additional strength, but the other one is fine for almost any socks.

Printing:

print in an elastomer like TPU-95A. 2 top layers, 2 bottom layers. Infill at 10% but I don't think it matters.