These marathon, half marathon, ironman, 5k, 10k, 25k and half ironman race stickers are just under 3 inches wide and about 2 inches tall, they're about the same size as a business card. Not too big, but big enough to show off to your friends. They are cut-vinyl designs so there is no backing, the vinyl will last 5-7 years under normal circumstances. View the full line of stickers at www.myracesticker.com