How long does it take for green and golden bell frogs to become fully grown?

[Whistly]

Hi Everyone
I just learned from Ebony that my frogs aren't actually whistling tree frogs which the shop advertised them as they're actually green and golden bell frogs the oldest has been a frog for about 1 1/2 months and I was wondering how long does it take for them to become fully grown?
Thanks to anyone who helps.

[pez]

Males normally reach maturity after 9 months and females normally last 2 years.