Measuring a bit's thickness

[PaulaO]

I have a KK loose ring bit. It was Bob's, purchased over 20 years ago. I know it's too thick for Miss A. How do I measure the thickness? More precisely, WHERE do I measure the thickness? At the end of the bit that connects to the rings, or at the middle of the bit where it connects to the lozenge?

[Canyon]

For dressage, the USEF Rulebook (DR121) says - "The diameter of the snaffle mouthpiece must
be minimum 10 mm diameter at rings or cheeks of the mouthpiece (exception: for ponies, the diameter may be less than 10 mm)." I think calipers are used for measurement.

[Moutaineer]

If you don't know the thickness, and don't happen to have a pair of calipers lying around, I just took mine with me to the tack store and said "I want one like this but thinner."

[redsoxluvr]

If you have a picture I can probably tell you what size it is.

[Ryeissa]

For dressage, the USEF Rulebook (DR121) says - "The diameter of the snaffle mouthpiece must
be minimum 10 mm diameter at rings or cheeks of the mouthpiece (exception: for ponies, the diameter may be less than 10 mm)." I think calipers are used for measurement.

Yes, use calipers right to the inside of the rings. I've eyeballed with a measuring tape too, but obviously not as accurate.