Is my baby too big?

Cc • 22 | Nov.13.15
I have a 1month old that fits in 6month clothes 😳 is it normal? He weighed 7lbs 8oz at birth and never lost weight at his 2 week app he was 8lbs already I don't know how much he weighs now but he feels way heavier.. Now I have all this newborn clothes that he barely wore 😕