How big is the razor pocket rocket?

It depends on which razor pocket rocket you have. Every model (and there are several) is a different size. The Razor MX350, for example, as 12 inch tires and a 20 inch high seat. The MX650, on the other hand, is 36 inches high. You have to compare each product to find out the differences in height. They have a few that are higher and a few (like the Dirt Quad and Euro Scooter) which are lower. Your best bet is to shop online to compare the differences.