Exact Fit Delrin Ring Sizers: US Sizes 4 - 13 in 4mm, 6mm, 8mm, and 10mm Comfort Fit Widths



Exact Fit ring sizers in US sizes 4 - 13. Variations in ring width will often entail a minor change in sizing. These high quality sizers are available in standard widths of 4mm, 6mm, 8mm, and 10mm to take the guess work out of sizing for specific widths. They are also precisely matched in profile to comfort fit cores, which are now an industry standard. A cable to hold the set is provided free of charge when a full set is ordered. Please allow snug clearance over the relevant knuckle when sizing. Sizers are made from durable and high quality Delrin. Please send an inquiry if sizing above US 13 is required.


Individual sizers are available here:


These sizers are sold at my cost as a means to facilitate accurate sizing and to avoid costly exchanges.

Set shown in 6mm width.


Note that verifying correct sizing is the sole responsibility of the buyer. I do not offer resizing options for my made-to-order rings. It is recommended to visit a local jeweler for a complimentary sizing prior to ordering, or use an accurate method to determine sizing (not paper wrapped around a finger, and roughly measured). Inexpensive plastic or metal sizing rings are available that will yield a much more accurate result. Please note as well that wider cores (e.g. 8-10 mm) will typically fit a little more snugly than narrower widths, such as 4mm or 6mm. Please consider going up a half size for this wider option.

Shipping & Policies

Shipping from Canada

Processing time

3-5 business days

Estimated shipping times

  • North America : 3 - 6 business days

I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.

Customs and import taxes

Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.

Payment Options

Secure options
  • Accepts Etsy gift cards

Returns & Exchanges

Request a cancellation within: 6 hours of purchase

I don't accept returns or exchanges

But please contact me if you have any problems with your order.


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