Crib and Mattress size?

[deleted account] ( no moms have responded yet )

I have seen that if you can fit two fingers between the crib and mattress that the mattress is too small. I've seen that two fingers is fine, but not more than that. And how big do they assume my fingers are?

I've seen that there 'should not be a visible gap,' and that 'gap should be no mor than one inch.' I've also seen, however, that standard crib size is 54" while standard mattress size is just shy of 52" (giving a gap of 2".)

Can anyone direct me to a reputable source that says exactly how wide the gap between the crib and mattress can be and be considered safe? Both my crib and my mattress measure the way they are supposed to, but the mattress does not fit as snugly as I would like.

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