Size Guide
Because every piece is made to order, it's important to get your size right before you place your order. If you would like help, please get in touch.
Finding your size
01
Request a ring sizer
The most reliable method. Get in touch with your name and address and a complimentary ring sizer will be posted to you, free of charge, before you commit to an order.
02
Measure an existing ring
Place a well-fitting ring on a flat surface and measure the internal diameter - straight across the inside of the band - in millimetres. Match to the chart below.
A few things worth knowing
Fingers change size more than most people expect. For the most accurate result, measure at the end of the day rather than first thing in the morning, and avoid measuring in cold weather - fingers are noticeably smaller when cold.
Mercer 79 works in full sizes only. If you fall between two sizes, sizing up gives the most comfortable fit for everyday wear.
UK ring size chart
All measurements are in millimetres. Diameter is measured straight across the inside of the band.
I'd like a ring sizer
A complimentary ring sizer can be posted to you anywhere in the UK before you place your order. It takes a minute to use and removes any guesswork. Just get in touch with your name and address.
Request a ring sizer