Is Ranto small?

Ranto is 2 months and 2.5 weeks old here. He weighed 3.6 lbs today. The pet shop said he was born April 9th, so he's just over 80 days old. He seems very small to me. What do you all think? Can I expect a lot of growth in the next few weeks or is he just small?

Thanks



[mod edit: changed category and closed thread due to duplicate topic]