I didn't realize how many lolis we have in Idolmaster cinderella girls until I saw this picture (and I counted, 19 in all, holy crap)
There are certainly more depending on your definition for "lolis". Dropping obvious outliers (Kurumi for measurements, Wakaba for age, and Mary for height) we can get some limiters: 14 or younger, 150cm or shorter, biggest measurement 80 or less. Kozue, Rika, Noriko, Tomoe, Aoi, Koume, Sana, Mirei, Nono, Sachiko and Akiha all fit the bill. Girls that are close are Asuka, Miu, Nanami, Atsumi, Hiromi, Sae, Azuki, Sakura, Shoko, Tamami, Layla, Anzu and Nana. A little farther out is Hijiri, Mutsumi, Hotaru, Yuuki, Suzuho, and Yuka.
As for the LMBG group I'm surprised nobody has been added recently. We're still waiting on Momoka's LMBG Card and I'd like to see a few more girls added to the unit (Kozue, Rika, Aoi, and Nanami in particular).