Don't use crickets you think may be too large. They will usually go down fine and probably won't cause any problems, but why risk it? If you're going to have captive animals you're not supposed to expose them to problems they'd have in the wild... And I always read that smaller crickets are generaly more nutritious, anyway.
I've seen anoles... SMALL BROWN anoles take bugs much larger than their head down without a problem, but I don't think it's something I'd feed them myself at all.
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Got hips like Cinderella / Must be having a good shame / Talking sweet about nothing / Cookie I think you're Tame 