320 gsm or 140lb paper Sold in Packs of 20 sheets Square Paper 12" x 12" Deckled edges Tub sized (surface sized) with gelatin Artist Paper made from 100% long fibered cotton rag, resulting in exceptional strength and durability. They are tub sized (surface sized) with Gelatine. For watercolor and all painting and drawign media. For oil paint prime with gesso or acrylic primer. Acid free. This is a handmade item and is not eligible for return or refund.