Skip to content

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.
Platinum 1.00ct Brilliant Cut Diamond Half Eternity Ring
RamsdensPlatinum 1.00ct Brilliant Cut Diamond Half Eternity Ring
Platinum 0.50ct Brilliant Cut Diamond Half Eternity Ring
RamsdensPlatinum 0.50ct Brilliant Cut Diamond Half Eternity Ring
£779.00
18ct White Gold 0.33ct Brilliant Cut Diamond Half Eternity Ring
Ramsdens18ct White Gold 0.33ct Brilliant Cut Diamond Half Eternity Ring
£689.00
18ct White Gold 1.00ct Princess Cut Diamond Seven Stone Eternity Ring
Ramsdens18ct White Gold 1.00ct Princess Cut Diamond Seven Stone Eternity Ring
Was: £1,299.00
Now: £975.00
Save £324.00 (25%)
From £17.80 / monthFinance options available
18ct White Gold 0.33ct Brilliant Cut Diamond Seven Stone Eternity Ring
Ramsdens18ct White Gold 0.33ct Brilliant Cut Diamond Seven Stone Eternity Ring
£549.00
18ct Yellow Gold 0.50ct Princess Cut Diamond Seven Stone Eternity Ring
Ramsdens18ct Yellow Gold 0.50ct Princess Cut Diamond Seven Stone Eternity Ring
£899.00
18ct Yellow Gold 0.75ct Brilliant Cut Diamond Half Eternity Ring
Ramsdens18ct Yellow Gold 0.75ct Brilliant Cut Diamond Half Eternity Ring
18ct Yellow Gold 1.00ct Brilliant Cut Diamond Eternity Ring
Ramsdens18ct Yellow Gold 1.00ct Brilliant Cut Diamond Eternity Ring
18ct Yellow Gold 0.33ct Brilliant Cut Diamond Eternity Ring
Ramsdens18ct Yellow Gold 0.33ct Brilliant Cut Diamond Eternity Ring
£689.00
Platinum 1.10ct Radiant Cut Diamond Solitaire Ring
RamsdensPlatinum 1.10ct Radiant Cut Diamond Solitaire Ring
9ct Yellow Gold Garnet & Diamond Eternity Ring
Ramsdens9ct Yellow Gold Garnet & Diamond Eternity Ring
£425.00
9ct Yellow And White Gold Diamond Crossover Ring
Ramsdens9ct Yellow And White Gold Diamond Crossover Ring
£229.00
Platinum 1.10ct Princess Cut Diamond Solitaire Ring
RamsdensPlatinum 1.10ct Princess Cut Diamond Solitaire Ring
18ct Yellow Gold 0.22ct Brilliant Cut Diamond Twist Trilogy Ring
Ramsdens18ct Yellow Gold 0.22ct Brilliant Cut Diamond Twist Trilogy Ring
£499.00
18ct Yellow Gold Cubic Zirconia Single Stone Ring
Ramsdens18ct Yellow Gold Cubic Zirconia Single Stone Ring
£329.00
9ct White Gold Moissanite Single Stone Ring
Ramsdens9ct White Gold Moissanite Single Stone Ring
£179.00
14ct Yellow Gold Amethyst Single Stone Ring
Ramsdens14ct Yellow Gold Amethyst Single Stone Ring
£649.00
9ct Yellow Gold Citrine Large Stone Ring
Ramsdens9ct Yellow Gold Citrine Large Stone Ring
£839.00
14ct Yellow Gold Multi Gemstone Fancy Ring
Ramsdens14ct Yellow Gold Multi Gemstone Fancy Ring
£409.00
18ct White Gold Cubic Zirconia Full Eternity Ring
Ramsdens18ct White Gold Cubic Zirconia Full Eternity Ring
£469.00
9ct Yellow Gold Pearl and Cubic Zirconia Cluster Ring
Ramsdens9ct Yellow Gold Pearl and Cubic Zirconia Cluster Ring
£139.00
9ct Yellow Gold 2.00ct Brilliant and Marquise Cut Diamond Cluster Ring
Ramsdens9ct Yellow Gold 2.00ct Brilliant and Marquise Cut Diamond Cluster Ring
9ct Yellow Gold Cubic Zirconia and Garnet Fancy Ring
Ramsdens9ct Yellow Gold Cubic Zirconia and Garnet Fancy Ring
£349.00
9ct Yellow Gold Textured Signet Ring
Ramsdens9ct Yellow Gold Textured Signet Ring
£139.00
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.