We feel strongly that, when it comes to your vjayjay, you only want to put trustworthy stuff up there. Not all cups are equal. The Hello Cup is in a league of its own and is FDA registered.
Our L is best for those over 35 who feel it’s a bit more roomy up there (possibly thanks to pushing out a small human or two). It’s worth noting that we find physically fit people are often best suited to the S/M regardless of age.