DS is 10 months, but in 18 month clothing. I'm finding it pretty difficult to find onesies for him. I wanted to keep him in onesie style tops for as long as possible, since he doesn't walk and when you pick him up t-shirts always ride up and expose his belly. I know they are out there, but I buy most of his stuff second hand and find it much harder to find.

When did you switch from onesies and one-piece outfits to t-shirts and separates?