The obvious assumption is the 30 range sizes are bigger than the 20 range but I really wasn’t sure because people with wide faces were getting 21W. Can someone confirm? Multiple scans gave me 21W most of the time and 33W another time. I ordered 21W and tried on the light seal without AVP (arrives soon) but it feels small and there’s some light bleed by my nose. Will probably go in to the Apple store to exchange but can anyone with both a 20 something light seal and 30 something give a rough breakdown on what the size difference represents?