I remember chevron emart got measurements chart & you can calling them for advice. But I will recommend you to try it yourself.
I wear L size for old uniform & have similar problem for pixelised uniform during try out. I try wearing M-L size & it tighter then my old L size. I try L-XL size & it is too big. At the end I get L-XL size because I can still wear belt, button & etc to make it tight but I don't think I can lose weight to fit into M-L size.