Two skates for the price of one! Quick, interchangeable frames allow you to switch from quad roller skates to inline skates and back with ease. The boots feature adjustable sizing for growing feet, and expand up to 4 sizes with the push of a button. The comfort liners can be adjusted to grow with the skates and can be removed and washed. With these versatile skates, you can enjoy all that skating has to offer by choosing to roller skate or roller blade at any time! Switch out the frames by using 2 allen wrenches. Fits true to children's U.S. shoe sizes. Small adjusts from 12 to 2. Roller Derby® is America's Skate Company since 1936.