Suppose you sell, or make, clothes. You don't want to sell a man's shirt to a woman or vice versa? With many designs it's obvious but for some it's close but yo

Suppose you sell, or make, clothes. You don't want to sell a man's shirt to a woman or vice versa? With many designs it's obvious but for some it's close but you can't make that mistake so you need an easy, subtle way to distinguish them that won't impact form or function...