Questions about this little guy

[Kims' Reef]

Just found this little guy hanging out on a suction cup. IMO it looks like a microbrittle star, anyone know if they get bigger than this?

 

[Timfish]

Yup, tiny brittle star, beneficial scavenger. Depends on the species but of the two I commonly see a tiny white species stays under an inch across and a slightly larger species with dark red or brown banding gets about 2" across.

 

[Kims' Reef]

Thank you, just wanted to make sure they don't get large like the ones they sell at the store. I guess there's more of them because I just noticed this..