Size A4 Big Size, 11.69 X 8.27 inch / 29.7X 21 cm. They are a good size for hand held or hold on the wall without taking up too much wall space. Material Photo paper double-sided plastic, waterproof, anti-folding and fillet processing without scratch. Suitable for:Toddlers, Preschool Kids, Homeschoolers, Pupils. Preschool, Kindergarten, 1st, 2nd 3rd Grade. 3years+Used for:Class Supplies, Toys, Games, Learning Activities, Gift, etc.