Angel Beats Otonashi Yuzuru Halloween Cosplay Costume School Uniform

Hello, I am having trouble with your help site, I hope you can answer my question here. I want to order a custom cosplay for a man, I noticed you ask for very little information on custom sizing. Only height, waist and chest. If the man is not a typical shape, how can it fit if you don't know for hips and inseam and other important measurements? When I order, is there somewhere I can add this information so I can make sure it will fit him? Thank you.