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.
18ct Yellow Gold 1.50ct Brilliant Cut Diamond Two Row Ring
Ramsdens18ct Yellow Gold 1.50ct Brilliant Cut Diamond Two Row Ring
18ct Yellow Gold 1.25ct Brilliant and Baguette Cut Diamond Cluster Ring
Ramsdens18ct Yellow Gold 1.25ct Brilliant and Baguette Cut Diamond Cluster Ring
14ct Yellow Gold 0.85ct Brilliant and Marquise Cut Diamond Solitaire Ring
Ramsdens14ct Yellow Gold 0.85ct Brilliant and Marquise Cut Diamond Solitaire Ring
18ct White Gold 0.75ct Brilliant Cut Diamond Trilogy Ring
Ramsdens18ct White Gold 0.75ct Brilliant Cut Diamond Trilogy Ring
£799.00
18ct Yellow Gold 0.20ct Brilliant Diamond and Amethyst Ring
Ramsdens18ct Yellow Gold 0.20ct Brilliant Diamond and Amethyst Ring
£549.00
18ct White Gold 0.55ct Brilliant Cut Diamond Solitaire Ring
Ramsdens18ct White Gold 0.55ct Brilliant Cut Diamond Solitaire Ring
£779.00
18ct White Gold 0.75ct Brilliant Cut Diamond Trilogy Ring
Ramsdens18ct White Gold 0.75ct Brilliant Cut Diamond Trilogy Ring
£899.00
18ct Yellow Gold 0.55ct Brilliant Cut Diamond Half Eternity Ring
Ramsdens18ct Yellow Gold 0.55ct Brilliant Cut Diamond Half Eternity Ring
£749.00
9ct White Gold 1.25ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct White Gold 1.25ct Brilliant Cut Diamond Cluster Ring
9ct Yellow and Rose Gold Daffodil Openwork Clogau Ring
Clogau9ct Yellow and Rose Gold Daffodil Openwork Clogau Ring
£269.00
22ct Yellow Gold Grain Edge Wedding Band 6mm
Ramsdens22ct Yellow Gold Grain Edge Wedding Band 6mm
18ct Yellow Gold 0.45ct Brilliant Cut Diamond Cluster Ring
Ramsdens18ct Yellow Gold 0.45ct Brilliant Cut Diamond Cluster Ring
18ct White Gold 0.50ct Brilliant Cut Diamond Trilogy Ring
Ramsdens18ct White Gold 0.50ct Brilliant Cut Diamond Trilogy Ring
£699.00
14ct White and Rose Gold 0.10ct Diamond Solitaire Ring
Ramsdens14ct White and Rose Gold 0.10ct Diamond Solitaire Ring
£279.00
9ct Yellow Gold 0.20ct Brilliant Cut Diamond Solitaire Ring
Ramsdens9ct Yellow Gold 0.20ct Brilliant Cut Diamond Solitaire Ring
£319.00
9ct Yellow Gold 0.20ct Brilliant Cut Diamond Cluster Ring
Ramsdens9ct Yellow Gold 0.20ct Brilliant Cut Diamond Cluster Ring
£279.00
18ct White Gold 2.00ct Brilliant and Baguette Cut Cluster Ring
Ramsdens18ct White Gold 2.00ct Brilliant and Baguette Cut Cluster Ring
18ct White Gold 1.20ct Brilliant Cut Diamond Solitaire Ring
Ramsdens18ct White Gold 1.20ct Brilliant Cut Diamond Solitaire Ring
18ct White Gold 1.35ct Brilliant Cut Diamond Cluster Ring
Ramsdens18ct White Gold 1.35ct Brilliant Cut Diamond Cluster Ring
9ct Yellow Gold Cubic Zirconia and Sapphire Heart Ring
Ramsdens9ct Yellow Gold Cubic Zirconia and Sapphire Heart Ring
£149.00
9ct Yellow Gold Cubic Zirconia Cluster Ring
Ramsdens9ct Yellow Gold Cubic Zirconia Cluster Ring
£219.00
18ct White Gold 1.20ct Brilliant Cut Diamond Five Stone Ring
Ramsdens18ct White Gold 1.20ct Brilliant Cut Diamond Five Stone Ring
Was: £2,199.00
Now: £1,649.00
Save £550.00 (25%)
From £19.55 / monthFinance options available
9ct Yellow Gold 0.20ct Diamond Crossover Ring
Ramsdens9ct Yellow Gold 0.20ct Diamond Crossover Ring
£189.00
9ct Yellow Gold 0.01ct Diamond And Amethyst Cluster Ring
Ramsdens9ct Yellow Gold 0.01ct Diamond And Amethyst Cluster Ring
£219.00
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.