Kana, Qarinah, Hana and Ami also have small boobs.
More big than small boobs in the game but there definitely are smaller boobs in the game
Well, it depends on what counts for you as small.
For me, Madison's are comically oversized but for someone else they're just big.
Anywho, you forgot Emma, the Rinkos, Zoe and Penny, the two blondes in the college courtyard, Jackie and Hatsume from the kunoichi.
Some of those have a bit of boobage and some are almost flat.
Depends on your range.