What size belly button ring should I wear?
If you have a shallow piercing, and the standard 3/8" curved barbell is too long, then you should wear a 5/16" length.
If you have a Deep piercing, and the standard 3/8" curved barbell is too short, you should wear a 1/2" long barbell. If this is still too tight, then you will need a 5/8" long barbell.
for more details on measuring a belly button ring, please view our Squidoo Page