Is there a tutorial or instructions on how to size this thing or is it with or without foam? Thanks for any help or suggestions

I'm looking to buy a rubie hg batsuit but on the fence for sizing my waist size is 36 and I'm 5'9 200 lbs I only see two sizes standard and xl whic xl looks way to big but standard I'm a little bigger than if some one could please help that would be awesome!!!