Buying a promise ring for a man is a slightly different job from buying one for a woman, and most guides skip the parts that actually matter: what he will tolerate wearing every day, and where to buy it without ending up with something that turns his finger green.

Here is the practical version.

Start with what he already wears

Before you look at a single ring, answer three questions.

• Does he wear any jewellery now? A watch, a chain, a signet ring? If he wears nothing at all, a slim, plain band is far more likely to stay on his hand than anything decorative.
• What metal colour does he lean towards? Look at his watch, belt buckle and glasses. Most people are consistent without realising it.
• What does he do with his hands all day? A builder, a nurse, a mechanic, a climber or a gym regular will take a ring off constantly — or damage it. This should steer both the metal and the setting.

That last one is the one people ignore, and it is the reason so many men’s rings live in a drawer.

Where to buy — the four realistic routes

Where	Good for	The catch
A specialist jeweller (us included)	Solid gold or platinum, proper sizing, resizing later, certification on stones.	Costs more than a high street fashion ring. You are paying for metal that lasts.
High street fashion retailers	Cheap, immediate, low risk if you are unsure he will wear it.	Usually plated base metal. Expect discolouration and wear within months.
Online marketplaces	Enormous choice, very low prices.	Metal descriptions are often vague. “Gold filled”, “gold tone” and “925 plated” are not solid gold. Returns can be painful.
Bespoke / made to order	Matching pairs, engraving, an exact width, something that is genuinely his.	Takes longer. Worth planning a few weeks ahead.

If you only take one thing from this table: check what the metal actually is. “Sterling silver”, “9ct/14ct/18ct gold” and “platinum” are real materials with a stated composition. “Gold tone” and “gold plated” are a coating over something else, and coatings wear through.

What we stock, and what we do not

We should be straight with you. CarbonstoneUK does not currently list a separate men’s collection, and we do not have a range labelled “promise rings” — because a promise ring is defined by what it means, not by how it is made.

What we do have is a range of hand-made bands in solid gold, platinum and sterling silver, several of which work perfectly well on a man’s hand, particularly the plainer designs. For example:

• The Minimalist Round Cut Wedding Band (£687, correct at the time of writing) — clean, low profile, nothing to catch.
• The Ocean Wave Round Cut Wedding Band in Yellow Gold (£657) — a bit of character without being flashy, and a good option if he already wears yellow-toned metal.
• The Stackable Rose Cut Wedding Band in Sterling Silver (£489) — our lowest-priced band, in real sterling silver rather than plate.

Browse the full band collection to see everything side by side.

If none of them is right for him — and for a lot of men, a wider or heavier band is what is wanted — we design bespoke at no extra design cost. You pay for the metal and stones, not for the design work. A plain 4 mm or 5 mm band in 14ct gold or platinum, with an engraved date inside, is one of the most common things we are asked to make.

Width, comfort and the details that decide whether he wears it

• Width: 2–4 mm reads slim and modern; 5–7 mm reads traditionally masculine. Wider bands feel tighter, so size up around half a size above roughly 4 mm.
• Profile: a rounded inside edge (often called comfort fit) is noticeably easier to wear all day than a flat one.
• Finish: a brushed or matte finish hides scratches far better than a high polish. Polished gold on an active hand will scuff within weeks — it can be re-polished, but if that would bother him, start matte.
• Stones: if you want a diamond, choose one set flush or in a bezel rather than raised in claws. Claws snag on gloves, pockets and hair.
• Metal hardness: platinum is denser and scratches into a soft sheen rather than wearing away. Gold is lighter on the hand. Sterling silver is the most affordable but is soft, and will need occasional polishing.

Sizing him without asking

Men’s fingers vary far more than women’s, so guessing is risky. The reliable methods:

• Borrow a ring he already wears on the same finger and have it measured — even a cheap one gives you the right number.
• Ask someone who has bought him jewellery before.
• Order a small plastic ring sizer online and measure him “as a joke” a few weeks earlier, before he could connect it to anything.
• Choose a plain band, which is straightforward to resize afterwards. Rings set with stones all the way round cannot be resized, because there is no plain metal to work with.

Our rings come with free insured UK delivery and 30-day returns, so a sizing mistake is fixable rather than final.

Should the rings match?

Only if you both want them to. Matching metal is usually enough to make two rings read as a pair without forcing him into a design he would not choose. A common solution: the same metal and the same engraving inside, different widths and finishes outside.

Where he should wear it

Most men in the UK wear a promise ring on the right ring finger, which keeps the left ring finger free. The middle finger is the other common choice for wider bands, and the little finger has a long history of carrying men’s rings. Our guide to which hand and finger a promise ring goes on covers this in more detail.

Frequently asked questions

Where can I get a promise ring for my boyfriend?

From any jeweller — there is no special category to search for. Look at plain bands and simple signet-style rings rather than anything labelled “promise ring”, and check that the metal is solid rather than plated. We make men’s bands to order at no extra design cost if nothing in stock suits him.

How much should I spend?

Less than an engagement ring, and whatever is comfortable for you. There is no convention or percentage that applies to promise rings. A solid sterling silver or 9ct gold band is a genuine, lasting gift at a modest figure.

Do men actually wear promise rings?

Plenty do, particularly as one half of a matching pair. The ones who stop wearing them usually do so because the ring is uncomfortable, too wide, or wrong for their work — not because of the sentiment.

Can I get it engraved?

Yes, on any band with enough plain metal inside. A date, initials or a short phrase. Keep it brief; there is less room than you would think.

Is sterling silver good enough?

It is real, solid metal and it will last for years, which already puts it far ahead of anything plated. It is softer than gold, so it marks more easily and benefits from an occasional polish. If he is hard on his hands, gold or platinum is the better long-term choice.

What if he does not like jewellery at all?

Then a ring on a chain, worn under a shirt, is a perfectly respectable answer — and far better than a ring he quietly never puts on.

If you would like a hand narrowing it down, or you want to talk through a bespoke band, get in touch. We are a small lab-grown diamond jeweller in North Harrow and we are happy to spend the time.