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O Size Rings

Browse our collection of O size rings here at Ramsdens Jewellery. You can make sure you're looking at the right range for you by using our printable ring size guide. And, if you're between sizes, you might be interested in our N size or P size rings.
9 Carat White Gold 0.12pts Diamond & Ruby Ring
Ramsdens9 Carat White Gold 0.12pts Diamond & Ruby Ring
£495.00
RRP £845.00
9 Carat White Gold 0.12pts Emerald And Diamond Cluster Ring
Ramsdens9 Carat White Gold 0.12pts Emerald And Diamond Cluster Ring
£475.00
RRP £805.00
9 Carat White Gold 25pts Channel Set Diamond Half Eternity Ring
Ramsdens9 Carat White Gold 25pts Channel Set Diamond Half Eternity Ring
£619.00
RRP £1,049.00
9 Carat Yellow Gold 50pts Channel Set Half Eternity Ring
Ramsdens9 Carat Yellow Gold 50pts Channel Set Half Eternity Ring
9 Carat Yellow Gold 50pts Diamond & Ruby Half Eternity Ring
Ramsdens9 Carat Yellow Gold 50pts Diamond & Ruby Half Eternity Ring
£555.00
RRP £945.00
9 Carat Yellow Gold 50pts Diamond & Sapphire Half Eternity Ring
Ramsdens9 Carat Yellow Gold 50pts Diamond & Sapphire Half Eternity Ring
£555.00
RRP £945.00
9 Carat White Gold 50pts Channel Set Half Eternity Ring
Ramsdens9 Carat White Gold 50pts Channel Set Half Eternity Ring
9 Carat Yellow Gold 15pts Channel Set Wishbone Ring
Ramsdens9 Carat Yellow Gold 15pts Channel Set Wishbone Ring
£469.00
RRP £795.00
9 Carat White Gold 15pts Channel Set Diamond Wishbone Ring
Ramsdens9 Carat White Gold 15pts Channel Set Diamond Wishbone Ring
£469.00
RRP £795.00
9 Carat White Gold 40pts Bar Set Ring
Ramsdens9 Carat White Gold 40pts Bar Set Ring
£815.00
RRP £1,385.00
9 Carat Yellow Gold Diamond 0.15pts & Emerald Half Eternity Ring
Ramsdens9 Carat Yellow Gold Diamond 0.15pts & Emerald Half Eternity Ring
£549.00
RRP £935.00
9 Carat Yellow Gold 0.25pts Diamond Ring
Ramsdens9 Carat Yellow Gold 0.25pts Diamond Ring
9ct Yellow Gold 0.50ct Diamond Signet Ring
Ramsdens9ct Yellow Gold 0.50ct Diamond Signet Ring
9 Carat Yellow Gold 0.22pts Diamond Ring
Ramsdens9 Carat Yellow Gold 0.22pts Diamond Ring
£475.00
RRP £809.00
9 Carat White Gold 0.22 Pts Diamond Half Eternity Ring
Ramsdens9 Carat White Gold 0.22 Pts Diamond Half Eternity Ring
£475.00
RRP £809.00
9 Carat White Gold 0.50pts Diamond Ring
Ramsdens9 Carat White Gold 0.50pts Diamond Ring
18 Carat Yellow Gold 1.50ct 5 Stone Diamond Ring
Ramsdens18 Carat Yellow Gold 1.50ct 5 Stone Diamond Ring
18 Carat White Gold 1.50ct 5 Stone Diamond Ring
Ramsdens18 Carat White Gold 1.50ct 5 Stone Diamond Ring
9 Carat Yellow Gold 34pts Invisible Set Diamond Trilogy Ring
Ramsdens9 Carat Yellow Gold 34pts Invisible Set Diamond Trilogy Ring
9 Carat Yellow Gold 33cts Diamond Cluster Ring
Ramsdens9 Carat Yellow Gold 33cts Diamond Cluster Ring
£779.00
RRP £1,325.00
9 Carat Yellow Gold 25pts 7 Stone Diamond Half Eternity Ring
Ramsdens9 Carat Yellow Gold 25pts 7 Stone Diamond Half Eternity Ring
£585.00
RRP £999.00
9 Carat Yellow Gold 0.15pts Diamond & Ruby Half Eternity Ring
Ramsdens9 Carat Yellow Gold 0.15pts Diamond & Ruby Half Eternity Ring
£549.00
RRP £935.00
9 Carat Yellow Gold Diamond-15pts & Sapphire Half Eternity Ring
Ramsdens9 Carat Yellow Gold Diamond-15pts & Sapphire Half Eternity Ring
£549.00
RRP £935.00
9 Carat Yellow Gold 0.10pts Channel Set Half Eternity Ring
Ramsdens9 Carat Yellow Gold 0.10pts Channel Set Half Eternity Ring
£405.00
RRP £689.00
A UK ring size O has a circumference of 55.1mm, which means it's the equivalent to a US 7 and an EU 54 ⅝. It's a relatively common ring size, which means we typically have an extensive range of styles in this size. However, some of them are one-offs, so it's best to make a quick decision if there's a piece you love!

Because there are so many men's and women's rings in a size O to choose from, you should have no trouble finding a beautiful accessory to suit your needs. Whether you're planning to propose to your beloved and are shopping for an engagement ring in a size O, or you're looking to treat yourself to a size O diamond or gold ring, we'll have just the thing to fit the bill.

These aren't the only rings we stock, either. So, if you would like more options, make sure you check out our entire collection of luxury rings, as we often have pieces that can be resized to fit you perfectly.

Found a men's or women's ring in a size O that you love? Shop online today with free UK delivery. We also offer a 14-day returns period to give you complete peace of mind.