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.
In my opinion, in many cases getting this right will be the difference between enjoying this device or not.