-handmade nickel free piercing ring suitable for many different piercings -nice flash of metal with these rings -the wire gauge options are 14 and 16 gauge -all measurements are internal diameter -if you prefer outer diameter add a note on your purchase invoice -these are endless rings -you twist to the side to open and twist back -the 14g rings will likely need piers for most people unless the ring is large -the same applies to 16g to a lesser degree -I have hammered the bottom of the ring -it is not possible to to texture front and back -you are purchasing one ring -nickel free Metal choices 14k yellow gold filled 14k rose gold filled argentium sterling sterling silver grey niobium Diameter Mm = Inches 6mm = 1/4" 8mm = 5/16" 10mm = 3/8" 13mm = 1/2" VISIT MY SHOP BELOW TO SEE MORE INNOVATIVE EARRINGS http://www.etsy.com/shop/CecileStewartJewelry?view_type=gallery What is inner diameter and outer diameter? Inner diameter is the measurement of the space within a ring. Outer diameter is the space within the ring plus the metal on both sides. Every piercing is unique. Some jewelry may require tools or help to safely insert or change. When in doubt, please consult a piercing salon.