These are the size and shape of a credit card (3 1/4" by 2"). They come in several grades. I stock coarse (325 grit), fine (600 grit) and super fine (1200 grit). If you don't specify otherwise, I'll send a fine. With the plastic sleeve it weighs a bit under 1 1/2 ounces. It's not much thicker than a credit card (.069" in the sleeve), so it rides easily in your wallet. Made in the USA by DMT.