MT Ring Sizer

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Not all rings sizers are the same or measure accurately! A size N for example should be an universal measurement but that is not always the case. Ours are accurate and compatible with our UK standard gauges.


To make ordering a ring from our web site a little easier for you, we have this ring sizer available. When you purchase this, we will send you a code for £5.00 off any ring available on the web site. 


Did you know, if you are ordering a ring wider that our Linear Ring you may need to go up a size so please tell us exactly what fits you and we will make allowances to ensure the ring you order is a perfect fit.

For every purchase that is made on line, we plant a tree!
Mari Thomas has partnered up with B- Corp company Ecologi to save the planet.

See how many trees you have helped us plant so far! Thank you

Pickup is available at Mari Thomas Jewellery Ltd if the item is in stock. Option to choose this at the checkout.

Usually ready in 24 -48 hours (we will contact you if anything different)

Delivery time through the post is approx 1-5 working days

£7.00 for items with a total under £100 (Royal Mail Recorded signed for delivery
£10.00 for items with a total over £100 (Royal Mail Special Delivery - insured)

£1.50 First Class Postage for our Ring Sizer Gauge

**Free UK Special delivery on all orders over £150 - automatically added at checkout*

We hope that all our customers will love their purchases and endeavour to supply the highest quality goods and service, but in the unlikely event that you need to return an item we operate a simple returns policy. We are happy to refund payment against items returned 14 working days from purchase.

Please contact to issue a return or visit our returns policy for more info.