I don’t know how to calculate stitch counts for different sizes, but I’ve provided the dimension of the one I made and some guidelines for making smaller/larger sizes. It’s measure-as-you-go and customizable :D

The construction is fairly straightforward, and it works up very quickly (I made it over the Easter long weekend while watching action movies on TV :D).

But since this is the first time I try writing a garment pattern there may be lots of mistakes – so if you try it and spot anything wonky please let me know, I’d greatly appreciate any corrections and feedback!