This cycle comes in a semi assembled state and will require assembly. Refer this YouTube link for assembling, LINK: https://youtu.be/Jz6I9IuHZao 20 Inches Bicycle Size, Suitable for (Ages 7 Years - 10 Years) & (Height 4'2'' - 4'9'') Real Tyres with inflatable inner tubes to help get past any road condition. Cycle is specially designed for kid. High Strength & High Durability Guaranteed.