Random thoughts on MTB sizing.

Every manufacturer is different.
Try before you buy.
Cock pit length is probably more important than standover.
You are better off with a bike that feels smaller than one where you are too stretched out. WSD in mountain bikes is designed for a longer legged shorter torso female, mostly. Many components can be swapped out for women specific ( handlebars, brake levers, saddle). Esp if you are buying used, you'll want to ride it and see how it feels.
Some companies measure inseam like trousers, some measure from crotch to floor so know what you are looking at for numbers.

FWIW, I am 5-3, 30" crotch to floor inseam measurement, and I ride a 15 man's Kona FS which fits great. For me I already know that a 16 or a 17 (!!) is going to be way too big.