How big do Manx cats get?

Manx cats are a medium-sized breed, with males being larger, around 10 to 12 pounds, and females weighing eight to 10 pounds. They stand about 9 to 11 inches tall at the shoulder. 

Compared to similar breeds, they’re larger than Japanese Bobtails but smaller than American Bobtails. American Bobtails are a bit heftier, with males weighing nine to 15 pounds and females seven to 12 pounds. Japanese Bobtails are on the smaller side, with males weighing six to 10 pounds and females five to eight pounds.