Size of cricket

[Immy]

Do you think leos will not eat crickets If they're are too big?

[Clementine_3]

I've found the opposite to be true actually. My guys don't seem to like smaller crickets (when they eat them, but it holds true for worms too).
General rule of thumb on cricket size though is the length of the cricket should be about the same as the width of the gecko's head, give or take. Worms can be longer of course.