Dressing Room Gymnastics
Before you buy a piece of clothing, ensure it works for you while moving (not just standing straight up). So while it might feel a little silly, do some dressing room gymnastics:
Sit down
Bend over
Squat down
Do some jumping jacks
Try any other key movements you’ll need to do in this clothing
If it passes the tests (and meets any other criteria you have), buy it!
If not, you could try to tailor it (often cheaper than you’d think) or keep looking.