The bikes shown in the picture, the green one is the 16 inches size, it comes in various colours and the blue, red one is the 12 inch size. the 12 inch bicycle  is smaller than the other one and it is suitable for kids of 2.5 years upto 5 years. the 16 inch bike is best suitable for kids of 6 years and above.Both bikes have a sturdy frame,dual brakes.the bikes are very very good. your kids will love them.you will get the exact size you choose from the variation but you may not get the exact colour you see in the picture because colors are chosen randomly for these bikes.the bikes will not dissappoint!