The Reylo Sticker
Available in 3 sizes: 3x3, 4x4 and 5x5 (that size is the “square” they come on, and you get to peel off the sticker in the shape shown in the pic! when measuring for your stickers, measure the longest side of the design. that's what the 3", 4", or 5" will be).
Durable vinyl for indoor use. Sure to make a statement wherever you stick them.