Hi guys, it seems (internet) that Apple Vison Pro Light Seals use a three character code. In the example 23W The first character (2) represents overall width the second character (3) represents depth and the third character (W) represents nose bridge width (N=narrow, W=Wide).
Apple Vison Pro Lght Seal Cushions come in Narrow, Wide, Narrow + and Wide + with the plus sizes being thicker/deeper.
I had read that there are 26 total variations. From what I can tell there are three widths (1,2,3), five depths (1,2,3,4,5) and two bridge widths (N,W). This would be 30 variations if all combinations have been produced.
There are also (obviously) 2 band styles, each comes in S,M,L.
We have two light seals here (21 Wide and 25 Wide), and I can tell you that changing between the two has a profound effect on field of view, glare/flare, light leakage, and comfort. We are both pleased so far but we are headed to Apple Store to make sure that we have the perfect fit.