Ring width
4mm wedding rings
A 4mm wedding ring is slim but clearly a band in its own right: 4 millimetres along the finger, about 0.16 of an inch. Many women choose it for a ring worn alone and it suits a man who wants a narrow band. We make 76 rings at 4mm, from £165, most of them in titanium, 9ct gold and black zirconium.
Every width in millimetres, drawn to the same scale. Tap one to see it.
Made at 4mm
4mm rings to look at
Each one opens at 4mm, with its price, finishes and weight on its own page.
Anodised channel
A band of real colour, set between natural metal edges.
Relieved black
Black cut back to bright metal along both edges.
Plain black zirconium
Black all the way round. None of it is a coating.
Stepped two tone
A machined step, black on one level and bright on the other.
Plain titanium
The lightest ring we make and the simplest.
Wood inlay
Real wood, set into a titanium channel.
What a 4mm wedding ring weighs
Find your size across the top. Every figure is a plain court band with a 1.6mm wall.
| Metal | J | L | N | P | T |
|---|---|---|---|---|---|
| Titanium | 1.3 | 1.4 | 1.5 | 1.5 | 1.7 |
| Black zirconium | 1.9 | 2.0 | 2.1 | 2.2 | 2.4 |
| 9ct gold | 3.4 | 3.6 | 3.7 | 3.9 | 4.2 |
| 18ct gold | 4.7 | 4.9 | 5.1 | 5.3 | 5.8 |
| Platinum 950 | 6.0 | 6.3 | 6.6 | 6.8 | 7.4 |
Worked out the same way as our ring weight calculator. A patterned, stone set or inlaid ring will differ from a plain band.
How a 4mm ring fits
Your usual size is the place to start at 4mm. The free ring size finder takes about two minutes at home. Find your size.
Other widths
2mm wedding rings3mm wedding rings5mm wedding rings6mm wedding rings7mm wedding rings8mm wedding rings9mm wedding rings10mm wedding ringsCompare every width
4mm ring questions
- How wide is a 4mm ring?
- 4 millimetres along the finger, about 0.16 of an inch. It reads as slim but clearly a band in its own right. Many women choose it for a ring worn alone and it suits a man who wants a narrow band.
- How much does a 4mm wedding ring weigh?
- At UK size N with a 1.6mm wall, about 1.5g in titanium, 2.1g in black zirconium, 3.7g in 9ct gold, 5.1g in 18ct gold and 6.6g in platinum 950.
- How much is a 4mm wedding ring?
- Our 4mm rings start at £165, with UK delivery included. 76 rings are made at this width.
- How different is 4mm from 5mm?
- One millimetre of width. In 9ct gold at UK size N, 4mm weighs about 3.7g and 5mm about 4.6g. In titanium the same two widths weigh 1.5g and 1.8g, so the difference is in how the ring looks far more than how it feels.
- Is a 4mm ring the same as ring size 4?
- No. 4mm describes the width of the band along the finger. Ring size describes the opening that fits around the finger. UK sizes use letters.
- Will a 4mm ring feel tight?
- Your usual size is the place to start at 4mm. The free ring size finder takes about two minutes at home.