Studio postcard pads are a creative and convenient way to send handmade images of your travels to your family and friends. The 20 cards bound into Fabriano's handy postcard pad are machine-made with 25% cotton content, measure 4" × 6" with a pre-printed postcard back, and feature a 140 lb (300 gsm), acid-free , cold press surface that is ideal for watercolors.