How tall should the average 12 year old boy be July 8, 2019 16 32 64 128 How much should the average 12 year old boy bench press How much should the average 12 year old boy bench How much should the average 12 year old boy be able to lift How tall should a 12 year old boy be average height Height 14 year old boy Average 10 year old height How old are you i'm 12