Hello there! There isn't really any conclusive answer for you, which I know - isn't the best way to start a post off. It's said that most frogs will have done most of their growing by the 2nd year and if my calculations are correct - that date is coming close. Every frog is different, but I'd say not to expect him to grow to anymore than 8 inches at the most. Of course, that doesn't mean it won't get any rounder! You can just never tell, and others might have different opinions or experiences too. But either way, 7.5 inches is definitely a healthy number and you should definitely be proud of your little (or I guess big) guy.