To rule out any risk of food dominace, they should be very close in size. Larger ones don't generally eat the babies, at least not in my experience. You just have to watch the fighting for food, beacause the largers ones WILL win, so try to get them the same size. Just to be safe.
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-Kristen
0.7 Leopard Gecko (Buttercup, Beaker, Beauty, Blaze, Bubbles, Blinkers, and Squiggles {yeah I broke with the B's, but her head has black squiggles on it!!!})
1.1 Fat Tail Gecko (Bell and Bowser {I've got egg!!!!})
0.1 Deformed Leopard Gecko (Gimpy)
Proud owner and operator of a Powerbook G4! Why use windows, when I can use Panther? It even sounds better.