12 inches in length and 3.5 inches around <no larger around than a coke can and I measured one>
I am very familiar with this because I love big, giant, huge toys.
Chaturbate tells me they are very strict so my toys have all been declined when I asked to use them...HOWEVER...
I do know that people do use much larger toys then are allowed because I've seen it...I do NOT use them on CB because i know it is very much against tos...so Im not sure if these people have special permission or they just ignore TOS...
and if anyone does have special permission please tell me how to get it because I want it too
Took me a minute but here is where it states exact size restrictions
https://archiveblog.chaturbate.com/news-and-announcements/overly-large-sextoys/