Size of little league baseball?

Judged from handling in sporting goods stores since about l966, I never played baseball. = They are essentially the same size. the field dimensions differ- with 60 feet between the basepaths, as opposed to 90 in the majors. there are other differences- lengths of games ( in some cases only 7 innings), but the ball is basically the same. Metallic bats have been standard equipment for some years- with their higher ( impact velocity)