Oh gosh, I can't really remember exactly but I know that there was a period there that normal clothes were too small and mat clothes were too big, I think about 20 weeks? I was using the Belly Belt before then for my work gear and jeans. Bigger size trackies are a good idea for around the house and I got men's t-shirts and long sleeved tops for around the house also that worked well.

The main thing is, if you feel uncomfortable, wear mat clothes or larger sized, no matter how many weeks you are. If can differ from person to person, feeling comfy is the most important thing!