If you're not sure what my ring names mean, read the explanation on my FAQ page. Important Note! Some ring suppliers who list millimeter sizes are actually selling inch sizes. If you're trying to match existing rings that you already have, please ask me if that supplier uses true millimeter sizes or inch approximations. If I don't know the answer, I'll ask you to send me one of each ring size that you're trying to match. Right now I only have white gold fill wire in even gauges (22ga, 20ga, 18ga, and 16ga). Other sizes will be added over time. Be sure to let me know if there's a gauge that you'd like to see next. No nickel content! The white in my white gold fill comes from palladium, not nickel. People with nickel sensitivity won't have a problem with these rings. White Gold Fill - Millimeter Sizes mandrel size ring   name     Price per Troy Ounce 2mm 2M22gfw $89.48 2.25mm 2.25M22gfw $89.48 2.5mm 2.5M20gfw $82.85 2.5M22gfw $89.48 2.75mm 2.75M20gfw $82.85 2.75M22gfw $89.48 3mm 3M18gfw $76.22 3M20gfw $82.85 3M22gfw $89.48 3.25mm 3.25M18gfw $76.22 3.25M20gfw $82.85 3.25M22gfw $89.48 3.5mm 3.5M18gfw $76.22 3.5M20gfw $82.85 3.5M22gfw $89.48 3.75mm 3.75M16gfw $69.59 3.75M18gfw $76.22 3.75M20gfw $82.85 3.75M22gfw $89.48 4mm 4M16gfw $69.59 4M18gfw $76.22 4M20gfw $82.85 4M22gfw $89.48 4.25mm 4.25M16gfw $69.59 4.25M18gfw $76.22 4.25M20gfw $82.85 4.5mm 4.5M16gfw $69.59 4.5M18gfw $76.22 4.5M20gfw $82.85 4.75mm 4.75M16gfw $69.59 4.75M18gfw $76.22 5mm 5M16gfw $69.59 5M18gfw $76.22 5.25mm 5.25M16gfw $69.59 5.25M18gfw $76.22 5.5mm 5.5M16gfw $69.59 5.5M18gfw $76.22 5.75mm 5.75M16gfw $69.59 6mm 6M18gfw $76.22 6.25mm 6.25M16gfw $69.59 6.5mm 6.5M16gfw $69.59 6.75mm 6.75M16gfw $69.59 7mm 7M16gfw $69.59