This is 100% cotton handmade watercolor paper with four deckled edges. Each sheet measures 4" by 4". These will be shipped flat. The thickness is a bit more than card stock, around 300 gsm (140 lb), Be aware though that the texture is very rough! Internal sizing makes for a very strong sheet. You can see by the journal images how the paper will react to watercolor paint. The artist of the photographed images is responsible for testing the paper, and he is very picky. Since he likes it, you probably will too!