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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.
14ct Yellow Gold 1.25ct Brilliant Cut Diamond And Sapphire Cluster Ring
Ramsdens14ct Yellow Gold 1.25ct Brilliant Cut Diamond And Sapphire Cluster Ring
Platinum 1.35ct Brilliant Cut Diamond Solitaire Ring
RamsdensPlatinum 1.35ct Brilliant Cut Diamond Solitaire Ring
9ct White Gold 0.10ct Diamond And Tanzanite Zig-Zag Ring
Ramsdens9ct White Gold 0.10ct Diamond And Tanzanite Zig-Zag Ring
£229.00
18ct Yellow Gold 0.12ct Diamond And Emerald Ring
Ramsdens18ct Yellow Gold 0.12ct Diamond And Emerald Ring
£369.00
18ct Yellow Gold 0.12ct Diamond And Ruby Ring
Ramsdens18ct Yellow Gold 0.12ct Diamond And Ruby Ring
£429.00
9ct Yellow Gold Smoky Quartz Single Stone Ring
Ramsdens9ct Yellow Gold Smoky Quartz Single Stone Ring
£489.00
Unique & Co Tungsten Black Carbon Fibre Wedding Ring
Unique & CoUnique & Co Tungsten Black Carbon Fibre Wedding Ring
£55.00
18ct White Gold 0.39ct Princess And Brilliant Cut Diamond Cluster Ring
Ramsdens18ct White Gold 0.39ct Princess And Brilliant Cut Diamond Cluster Ring
£529.00
9ct Yellow Gold Red Gemstone And Cubic Zirconia Three Stone Ring
Ramsdens9ct Yellow Gold Red Gemstone And Cubic Zirconia Three Stone Ring
£219.00
9ct Yellow Gold Blue Gemstone And Cubic Zirconia Claddagh Ring
Ramsdens9ct Yellow Gold Blue Gemstone And Cubic Zirconia Claddagh Ring
£259.00
9ct Yellow Gold Cubic Zirconia Mum Ring
Ramsdens9ct Yellow Gold Cubic Zirconia Mum Ring
£319.00
9ct Yellow Gold Celtic Ring
Ramsdens9ct Yellow Gold Celtic Ring
£265.00
9ct Yellow Gold Blue Gemstone And Cubic Zirconia Three Stone Ring
Ramsdens9ct Yellow Gold Blue Gemstone And Cubic Zirconia Three Stone Ring
£219.00
9ct Yellow Gold Green Gemstone And Cubic Zirconia Claddagh Ring
Ramsdens9ct Yellow Gold Green Gemstone And Cubic Zirconia Claddagh Ring
£265.00
9ct Yellow Gold Cubic Zirconia Claddagh Ring
Ramsdens9ct Yellow Gold Cubic Zirconia Claddagh Ring
£259.00
9ct White Gold 0.33ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct White Gold 0.33ct Brilliant Cut Diamond Cluster Ring
£469.00
18ct Yellow Gold 0.33ct Brilliant Cut Diamond Half Eternity Ring
Ramsdens18ct Yellow Gold 0.33ct Brilliant Cut Diamond Half Eternity Ring
£519.00
9ct Rose Gold 1.25ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct Rose Gold 1.25ct Brilliant Cut Diamond Cluster Ring
9ct Yellow Gold 0.25ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct Yellow Gold 0.25ct Brilliant Cut Diamond Cluster Ring
£299.00
9ct Yellow Gold St George Coin Ring
Ramsdens9ct Yellow Gold St George Coin Ring
£309.00
18ct White Gold 2.00ct Princess And Brilliant Cut Diamond Cluster Ring
Ramsdens18ct White Gold 2.00ct Princess And Brilliant Cut Diamond Cluster Ring
9ct Yellow Gold Onyx Signet Ring
Ramsdens9ct Yellow Gold Onyx Signet Ring
£309.00
9ct White Gold 0.75ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct White Gold 0.75ct Brilliant Cut Diamond Cluster Ring
£749.00
18ct Yellow Gold 0.50ct Brilliant Cut Diamond Solitaire Ring
Ramsdens18ct Yellow Gold 0.50ct Brilliant Cut Diamond Solitaire Ring
£849.00
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.