Pro Force6 oz. Elastic Drawstring Lightweight Student Uniform

Hey, my daughter is 5’2, 175LBS, and her waist is around 32in. she says she would like it baggier and not like fitted? what size do you think 5 or 4?

My son is 20 months and weighs around 22lbs. What size should I get?

My jutsu instructor recommends a heavy weight gi. what kind is this?

Is the size chart accurate? I'm 6' 0" tall and 200 lbs., would size 5 be a good fit after it shrinks in the wash?