I mistakenly bought a pair of boys' kilt hose thinking of those boys that wear men's shoes sizes, and assuming they were the same sizing. These are boys' 3-7 as in for a 5-year-old. It would cost me more to return them than I bought them for. Can anyone use them? I'll pay postage in the US.

These are charcoal, purchased from http://buyakilt.com/boys-standard-kilt-hose-4-colours.