50 sheets of half Imperial 22"x15" (56x38cm | 22x15") , 300gsm(140lb) Saunders Waterford paper.Saunders Waterford Watercolour paper is a high quality watercolour paper that is mould made from 100% rag (cotton). It is acid free and watermarked, has deckled edges (only on full imperial sheets) and is calcium cabonate buffered.This watercolour paper is available in Hot Pressed, NOT, and Rough Surfaces.