Since things fit Tiny Kitty very well, they would probably fit a number of Barbie bodies. I always use Barbie outfits for TK. Oh, even the SHOES and BOOTS fit TK.
Then I tried things on little Riley. The shorts, skirts, and t-shirts all fit great. The pants are too long, of course. The jacket sleeves are also too long.
The Creatable World dolls come in the cutest underwear. One doll has white underwear and the other doll has black underwear...so cute.