Review on Highly Reflective Mailbox Numbers - 40PCS 3 Inch White Decals for Modern Outdoor Mailboxes - Waterproof Adhesive Stickers for House Address, Trash Cans, Signs, Doors, and More! by Scott Welch

Very modern look. Sticky on our side only, but each number is included on both sides. It's hard to try to separate the edges, but you can do it, separate the corners. I have a regular sized black plastic box rounded at the top and I'm 3 inches, wish I was 4 inches but 3 is great anyway. If you want the numbers to go down, be sure to go 4+ inches. They are reflective. watch the video Separate along the edge, glue. Remove the top plastic and press down to lock. Be careful, they can wrinkle. I wish I could make a line with pencil or chalk as a guide first so they stay straight. Wouldn't use it at home. They are thin, not foil.