Felt sheets: craft felt, wool blend and what each is for
Felt is sold at very different prices for material that looks similar in a photograph. The difference is fibre content, and it determines how the edge behaves, how it takes a needl
GSM, pounds and what paper weight actually tells you
Paper is sold by weight in two incompatible systems and neither of them directly tells you how thick a sheet is. Understanding roughly what the numbers mean removes most of the gue