My little girl is so little, is it possible she is full grown?

[ToadTee]

I purchased my first two Firebelly's (Blitzy and Dumpling) almost three months ago, and the third (Pickle) about two months ago now. Blitzy and Pickle are definitely male (amplex and barking) and I am pretty sure Dumpling is a female. When I purchased the second male I made sure that he was very close in size to Dumpling as she is so small and Blitzy considerably larger. I didn't want her to be the only small toad.

However, since I've brought them home I have noticed Pickle has already grown somewhat bigger, but Dumpling seems only to have grown a little wider ( chubby girl) but does not appear to be growing any larger.

I would estimate that she is not quite 2", while Blitzy is easily close to 3" and Pickle a little better than 2".
Is it possible she is fully grown? Just destined to be the littlest toad in the tank?