The material is a tough, white, premium vinyl sticker, good for almost any very flat surface. Windows, smooth walls and laptops are ideal; bricks and wood are not. They are removable and can be taken down with little to no residue, but they're not designed to be re-stuck. Outdoors they'll last for at least 18 months. The dimensions of this sticker are 4.24 x 3.4 inches ................................................................... Art is copyright © Karen Hallion 2010 Please visit my shop: http://khallion.etsy.com The purchase does not give buyer reproduction rights of any kind.