The Mont Marte Signature A5 Canvas Pad 14.8cm x 21cm (5.8 x 8.3in) is suitable for use with any medium. The Signature Mont Marte A4 Canvas Pad 21cm x 29.7cm (8.3 x 11.7in) is suitable for use with any medium. Acid free Acrylic gesso primed 280gsm 10 sheet