365 Calf Guards/Sleeves (PAIR) 20-30mmHg - For Sports Recovery, Shin Splints, Medical, Work, Flight - Running, Cycling, Gym

I am right on the borderline between small and medium size (ie top of small range) which is best size?

If I get wrong size can I exchange for another size?

Are these spcific to each leg. I have one small leg and a large leg. Can you use the right sleeve on the left leg?

Football - looking for calf sleeves to hold shin pads in place. would these do the trick. or would they be too bulky when sprinting.