How big can he get?

Our youngest, Ramman, is weighing around 10 pounds at 6 months old, surpassing his 2-year and 2.5-year old sisters. He was such a teeny little baby when we brought him home, and now, he's still as cuddly and lovey-dovey as ever, but solid muscle and fur. We've heard he may have Maine Coon in him. Does anyone have a guesstimate as to how much he might weigh as an adult? I heard somewhere that you can double their weight at 4 months to get a roundabout adult weight, but we only really weighed him at 2 and 6.

Slyvie was 9.3 at 6 months vet said 12-14lbs

Cocos son Midnight was the runt and he ended up big and is 14 pounds. Seems like your Cat will way around 14-16 pounds.