This is the 15k version of the now-famous 26.2 race sticker, they 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.
We really only have these in white. It's a rare distance, if you'd like another color try ordering a custom sticker