Complex sentence: Mice engines are offered in many different sizes, shapes and arrangements, on and off scale sizes seem to range anywhere from 1/32 all the way up to 1/4 scale to be categorized as a true MICE.
Split into simpler sentences: Mice engines are offered in many different sizes, shapes and arrangements. On and off scale sizes seem to range anywhere from 1/32 all the way up to 1/4 scale to be categorized as a true MICE.