These are not some off brand but standard latex feet from seamite. Listed as 11+ I find them a bit big for my size 46 feet so I wonder how they compare to the L. Getting some rubber "tape" was a useful bonus.
I have had trouble with drysuit socks being too small or too tight. These xxls are perfect for my US size 13 clodhoppers. My suits sox were so difficult to put on I had to lube my feet to get them into the sox. Put these on with no problem. Haked off the ones on my suit and glued these on. Now I slip in no problem.
Not only are they sized adequately the quality is great. Rubber is even thickness.