There should be a special place in Hell for vendors who endeavor to sell sporrans without giving the size of the sporran, shoes without noting a width, products with cute color names without showing a color swatch, and claims that one size fits all or most...it doesn't.
Amen. I've been confused many a time, and scouring for posed pictures, etc.

Also, some sizes run big (what I call "American standard"), and some small (What I call "British standard").

But I digress.