I didn't know you could get bigger carriers for babies, I want to invest in one badly... I think I need one now

I don't having Isaac rare facing until that time, even if he outgrows it... I thought it goes up to 30lbs and now I went to the store it said 20lbs I'm so confused but I'll have to get more info he seems fine in it and has some room that should last until this fall. Wow some of our babies are already in 12-18 month clothes wow! We're going to have some football players!