***4cm gain in chest in 1 year /how much u gained?

can you guys tell me how much you gain of muscles in your chest over 1 year? I gained 4cm around the chest of muscles (no fat) is it a lot or not?or its typical 4cm a year? I train chest 3 times a week a bit disappointed about that 4cm so it means if I want to gain 12cm i need 3 more years?

share your stories and advices to compare