An archery tab is worn on three fingers of the string hand while shooting a recurve or longbow. I had bought the cheapest one I could and found it was too thin--my fingers hurt for two days. I didn't have any leather at home, so I used a two-layer approach: denim plus webbing, both from our scrap collections.
I've used this quite a number of times. It's ragged around the edges as can be seen, but shoots fine. The webbing is from a discarded child seat, I think, and it is very nicely slippery lengthwise but not transversely. (That might help with release in some way.)
Step 1: Cut denim
I used scissors to cut a tab shape, copying the inadequate one I had bought, from denim from some old jeans in a scrap drawer.