Found this information over at:
(sorry for all the tags, but I wanted to make sure everyone could find this!)
Pullip
* Liv clothing fits Type 4 , but it’s a wee bit loose.
* Barbie clothes fit Type 1 and 2. But they are very loose on Type 4 bodies, but fit with lots of…Monster High
* Disney VIP clothes fit
* Monster High Boys can’t wear Ken or My Scene clothing, it is too big. The shoes are also too small
* Teen Skipper clothing is a tad big on them, but works overall
* Bratz clothing is perfect
* Dal clothing is a little big, but works with a bobby pin
* La Dee Da clothing fits
* Monster High Boys can wear Bratz Boys outfits, but it’s a little short
* Moxie Girl pants and skirts fit, but not shirts. (< too big) But the shirts do fit Monster High Boys
* Stardoll shoes fit
*Cutie-Pop Clothes fit
Reblogging for the Monster High size guide (there are more in the post, she has a lot of great tips!)