I would not recommend buying from these guys the packaging was so unprofessional as soon as I opened up the package The sticky part was already worn Its nothing revolutionary, but it is fun. I notice battery drains fast 15 minutes went down 100%- 70%. Cant wait for the summer to wear them ?? overall, I am very satisified. Calidad perdecta y talla también. Saves space by standing the bikes upright versus having them lean on the kickstand. based on my use outdoors several times they are not suitable for me outdoors because they cannot match the support of my New Balance 928 hook and strap walkers. Move on from this cheap crap please! But you can look at the pair and clearly see that one is MUCH smaller.