The larger pedal option has a broader, non-slip platform for your feet. This may be more comfortable for people who want to have a larger base while pedalling. The velcro straps on the pedals are easy to adjust for almost all foot sizes.
Magnetic Pedaller Leg & Arm Workout Pedal Exerciser. Compact, lightweight, portable, and commercial grade leg & arm exerciser recommended for use by rehabilitation specialists. The patented magnetic resistance and sturdy steel frame make it the first choice for home use.