These are SO GREAT. My partner is a bartender and is asleep when I normally practice. When I have these on my zills, he can't hear a thing through his door. Total win for me. They were a little hard to get on at first, but it gets easier when you know what it feels like to get them on.
Otherwise - The S/M for item fits the student size, and if you are getting the larger **performance** zills, then you'll need the M/L size. The first reviewer is correct.
Reviewed by: (Verified Buyer) Vorsaga from Western MA on 6/3/2016