Originally Posted by howrsegirl123
Sorry, I guess that's just how it is. I measured them all.
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Your horse's mouth either wears a 5" or a 5 1/2" bit properly, not both. It is not physically possible.
If a snaffle is a bit too wide, it can work, and sometimes it is better when it is, such as with a loose ring snaffle (to avoid pinching.)
A curb however, does need to fit true to size, and properly.
What you're saying is that a snaffle, that is smaller than a supposedly properly fitting curb, fits your horse correctly; this is not possible.
What is possible however, is that your curb is either too wide, or your snaffle is too narrow.
Your horse's jaw does not defy physics.