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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.
18ct White Gold 1.75ct Diamond Ring
23% OFF
Ramsdens18ct White Gold 1.75ct Diamond Ring
Was: £2,999.00
Now: £2,299.00
Save £700.00 (23%)
From £27.25 / monthFinance options available
18ct Yellow Gold Multi Gemstone Ring
Ramsdens18ct Yellow Gold Multi Gemstone Ring
£369.00
9ct White Gold 0.33ct Diamond Cluster Ring
15% OFF
Ramsdens9ct White Gold 0.33ct Diamond Cluster Ring
Was: £429.00
Now: £365.00
Save £64.00 (15%)
18ct Yellow Gold Cubic Zirconia Cluster Ring
Ramsdens18ct Yellow Gold Cubic Zirconia Cluster Ring
£459.00
18ct White Gold Cubic Zirconia Three Stone Ring
Ramsdens18ct White Gold Cubic Zirconia Three Stone Ring
£549.00
9ct Yellow Gold 0.33ct Diamond Eternity Ring
15% OFF
Ramsdens9ct Yellow Gold 0.33ct Diamond Eternity Ring
Was: £429.00
Now: £365.00
Save £64.00 (15%)
18ct Yellow Gold 1.00ct Diamond Eternity Ring
15% OFF
Ramsdens18ct Yellow Gold 1.00ct Diamond Eternity Ring
Was: £999.00
Now: £849.00
Save £150.00 (15%)
From £17.92 / monthFinance options available
18ct Yellow Gold 0.50ct Emerald and 0.25ct Diamond Cluster Ring
10% OFF
Ramsdens18ct Yellow Gold 0.50ct Emerald and 0.25ct Diamond Cluster Ring
Was: £1,595.00
Now: £1,435.00
Save £160.00 (10%)
From £18.03 / monthFinance options available
Platinum 1.15ct Pink Sapphire and 0.55ct Diamond Vintage Inspired Ring
10% OFF
RamsdensPlatinum 1.15ct Pink Sapphire and 0.55ct Diamond Vintage Inspired Ring
Was: £2,350.00
Now: £2,115.00
Save £235.00 (10%)
From £25.07 / monthFinance options available
Platinum 0.50ct Diamond Trilogy Ring
15% OFF
RamsdensPlatinum 0.50ct Diamond Trilogy Ring
Was: £699.00
Now: £595.00
Save £104.00 (15%)
18ct Yellow Gold 0.50ct Diamond Solitaire Ring
15% OFF
Ramsdens18ct Yellow Gold 0.50ct Diamond Solitaire Ring
Was: £899.00
Now: £765.00
Save £134.00 (15%)
Platinum 0.85ct Diamond Daisy Cluster Ring
15% OFF
RamsdensPlatinum 0.85ct Diamond Daisy Cluster Ring
Was: £999.00
Now: £849.00
Save £150.00 (15%)
From £17.92 / monthFinance options available
14ct Yellow Gold Green Marquise Cubic Zirconia Ring
Ramsdens14ct Yellow Gold Green Marquise Cubic Zirconia Ring
£319.00
9ct White Gold Two Stone 0.50ct Diamond Twist Ring
15% OFF
Ramsdens9ct White Gold Two Stone 0.50ct Diamond Twist Ring
Was: £549.00
Now: £465.00
Save £84.00 (15%)
18ct Yellow Gold 2.30ct Diamond Solitaire Ring
27% OFF
Ramsdens18ct Yellow Gold 2.30ct Diamond Solitaire Ring
Was: £17,499.00
Now: £12,799.00
Save £4,700.00 (27%)
From £151.73 / monthFinance options available
9ct White Gold 0.25ct Diamond Crossover Ring
Ramsdens9ct White Gold 0.25ct Diamond Crossover Ring
£319.00
18ct Yellow Gold 0.50ct Diamond Eternity Ring
15% OFF
Ramsdens18ct Yellow Gold 0.50ct Diamond Eternity Ring
Was: £529.00
Now: £449.00
Save £80.00 (15%)
18ct White Gold 1.00ct Diamond Solitaire Ring
Ramsdens18ct White Gold 1.00ct Diamond Solitaire Ring
Platinum 0.30ct Diamond Solitaire Ring
15% OFF
RamsdensPlatinum 0.30ct Diamond Solitaire Ring
Was: £599.00
Now: £509.00
Save £90.00 (15%)
18ct White Gold 0.33ct Diamond Trilogy Ring
15% OFF
Ramsdens18ct White Gold 0.33ct Diamond Trilogy Ring
Was: £599.00
Now: £509.00
Save £90.00 (15%)
9ct White Gold 0.33ct Diamond Solitaire Ring
15% OFF
Ramsdens9ct White Gold 0.33ct Diamond Solitaire Ring
Was: £499.00
Now: £425.00
Save £74.00 (15%)
9ct Yellow Gold 0.90ct Diamond Fancy Ring
15% OFF
Ramsdens9ct Yellow Gold 0.90ct Diamond Fancy Ring
Was: £829.00
Now: £705.00
Save £124.00 (15%)
18ct White Gold 0.33ct Diamond Solitaire Ring
15% OFF
Ramsdens18ct White Gold 0.33ct Diamond Solitaire Ring
Was: £499.00
Now: £425.00
Save £74.00 (15%)
14ct Yellow Gold 0.55ct Diamond Eternity Ring
16% OFF
Ramsdens14ct Yellow Gold 0.55ct Diamond Eternity Ring
Was: £579.00
Now: £489.00
Save £90.00 (16%)
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.