Wear the smart ring on the index finger of the hand you use less, and keep a finger between it and your wedding band. For most right-handed men, that puts both rings on the left hand: the band on the ring finger, the smart ring on the index finger, the middle finger in between. That’s where the advice from Oura and Samsung, two of the best-known smart ring makers, points. Smart rings are also getting slimmer: Oura’s Ring 5, announced on May 28, 2026, is 40% smaller by volume than the Ring 4, and Oura says in its announcement that it “feels and fits like any other ring.” This guide covers what the makers advise, where each ring goes, why the two shouldn’t touch, how to size a smart ring when you already know your band size, and whether one ring can do both jobs.
Key takeaways
- Best spot: the index finger of your less-used hand. Oura recommends the index finger for accuracy, and both Oura and Samsung suggest the hand you use less. For a right-handed man with his band on the left, that’s the same hand, with a finger between them.
- Keep them apart. Oura advises against wearing its ring directly next to another ring, and Samsung says to avoid metal rings on the same or adjacent fingers.
- A silver band takes the scratches. Oura warns that its ring can scratch softer metal jewelry, and sterling silver is soft.
- Size it on its own. Your band size may not carry over. Use the maker’s sizing kit for a full day and night.
- As your wedding band? It can work, but it comes off to charge about once a week, newer models keep arriving, and it can’t be resized like a metal band.
In this guide Makers’ advice Where each goes Scratches Sizing As your band? Style Daily wear FAQ
What Oura and Samsung say
Both companies publish wearing advice for their rings, and on the points that matter here, they mostly agree.
- Which finger. Oura recommends the index finger “for the best accuracy” and says the middle or ring finger also works, as long as the knuckle isn’t much wider than the base of the finger, according to its sizing guide. Samsung’s sizing kit told buyers to use the index finger “for optimal performance and accuracy,” SamMobile reported in 2024, but Samsung told the site that tracking is the same on any finger and that the advice is about its pinch gestures.
- Which hand. “We recommend wearing your Oura Ring on your non-dominant hand,” Oura says in its safety and use guide, because it will likely reduce contact with surfaces and other objects. Samsung’s setup guide agrees: “Wear the ring on your non-dominant hand to avoid scratching it.”
- Other rings. Oura recommends “avoiding wearing your Oura Ring directly next to another ring,” which can cause uneven pressure and trap moisture that leads to skin irritation. Samsung is more specific: “Do not wear metal jewelry on adjacent fingers,” and its wearing precautions rule out the same finger too.
Other makers publish their own guides, so check yours before you settle on a finger.
Where each ring goes: four layouts
Put that advice together with the US custom of a wedding band on the left ring finger, which our guide to how to wear rings covers, and one layout comes out ahead.
- Best: same hand, index finger. For a right-handed man, the left is the less-used hand, the index finger is the one Oura recommends, and the middle finger keeps the two rings apart. It also leaves the right hand free for another ring, if you wear one.
- Also fine: the index finger of the other hand. If you’re left-handed, this is your best spot, because your right hand is the one you use less. A right-hander can wear it here too, but on the busy hand the smart ring takes more knocks, which is why both makers point to the other hand.
- Avoid: the middle finger, next to the band. Samsung’s advice rules out the adjacent finger, and the two rings can rub when your fingers close.
- Avoid: both on the ring finger. Stacking the two is what both makers advise against. The rings rub, Oura warns of uneven pressure and trapped moisture, and a smart ring is meant to “sit securely at the base of your finger,” where the band already is.
Scratches: why the silver band gets the worst of it
The Oura Ring 5 is titanium, and every finish has a “super hard” PVD coating for scratch resistance, according to Oura’s Ring 5 overview and its guide to finishes. The finishes guide also warns that the ring “may get scratched and can itself scratch softer metal jewelry.” Sterling silver is soft: of the three metals in our comparison of silver, steel, and titanium, it has the lowest scratch resistance. When a smart ring and a sterling band rub together, the band is likely to show it first.
Scratches go both ways. “Other rings may scratch your Oura Ring while rubbing against it,” Oura says, and neither Oura’s nor Samsung’s warranty covers scratches from everyday wear. Fine scratches on a sterling band polish out with a silver cloth; deeper ones are a job for a jeweler, as our guide to getting scratches out of a silver ring explains. A finger between the two rings costs nothing.
Sizing: why your band size won’t carry over
Smart rings are sized on their own terms. Oura makes whole sizes only, which “differ slightly from standard US ring sizes,” and says not to size its ring from other rings you own; even the Ring 5 is sized slightly differently from the Ring 4, according to Oura’s Ring 5 overview. Samsung warns in its sizing guide that “your usual size may not be the best fit due to the sensors inside.”
The shape is part of it. The Oura Ring 5 is 6.09 mm wide and 2.28 mm thick, Oura says, and the Galaxy Ring is 7 mm wide and 2.6 mm thick, according to Samsung, while 4 to 5 mm is the traditional width for a wedding band, as our wedding band guide notes. A wide ring covers more of the finger and feels tighter, which is why bands 6 mm and wider usually need a half size up, our ring size guide explains. That rule is for metal bands: Oura says its sizers are the same width as the ring, so go by the sizer rather than adding a half size. And the index finger runs about a size larger than the ring finger, the same guide notes, so your band size probably wouldn’t fit there anyway.
To size a smart ring:
- Use the maker’s sizing kit and try the samples on the finger the ring will live on.
- Wear the sample for a full day and night. Oura says a full day, sleep included; Samsung says more than 24 hours, including while you sleep. Fingers change size through the day and with the seasons, as our guide to rings that loosen in winter explains.
- Aim for snug, not tight. Oura’s check is to make a fist: if you see a gap between the ring and the top of your finger, try a smaller size, and if you’re between sizes, choose the smaller one.
- Check the size range first. The Oura Ring 5 comes in sizes 6 to 13, narrower than the Ring 4’s 4 to 15, according to Engadget; the Galaxy Ring comes in 5 to 15. If your index finger is above a 13, the Ring 5 won’t fit it, so look at a model that goes larger.
Can a smart ring be your wedding band?
It can. Oura lists the ring finger among the fingers for its Ring 5, and Samsung says tracking works on any finger, so a smart ring on the left ring finger does the job if you’d rather wear one ring than two. Before you commit, weigh what makes it different from a band:
- It comes off to charge. Oura rates the Ring 5 at 6 to 9 days of battery, and Samsung rates the Galaxy Ring at up to 7 days, so roughly once a week it leaves your finger for the charger.
- Newer models keep coming. Oura announced the Ring 4 in October 2024, according to DC Rainmaker, and the Ring 5 in May 2026. The ring’s battery is “non-replaceable,” Oura says. A wedding band is meant to last for decades; a smart ring is something you upgrade.
- It can’t be resized like a metal band. A sterling band can usually go up or down one or two sizes, as our guide to resizing a silver ring explains; a smart ring can’t. If your finger changes, Oura suggests moving the ring to another finger or hand where it still fits snugly; otherwise, you need a new ring.
- Scratches aren’t covered. Neither Oura’s nor Samsung’s warranty covers scratches from everyday wear.
If you like the idea but not the trade-offs, the best layout above gives you both: the band stays where it is, and the smart ring sits two fingers over. The same question comes up for a man’s engagement ring, which our guide to men’s engagement rings covers.
Making them look right together
Match the tone. The Oura Ring 5 comes in six finishes: silver, brushed silver, black (glossy), Stealth (matte black), gold, and deep rose, according to Oura’s guide to finishes and TechCrunch. Next to a sterling, white gold, or platinum band, silver or brushed silver reads as part of the same set; next to a yellow gold band, the gold finish comes closest. Black and Stealth contrast with any band. Our guide to mixing silver and gold covers two tones on one hand.
Mind the width. Smart rings have long been bulky: unless you like chunky jewelry, Engadget wrote when the Ring 5 launched, “it’s likely your smart ring makes every other ring you wear look tiny by comparison.” If you’re choosing a band now, a slightly wider one, around 5 to 6 mm, can look more balanced beside a smart ring 6 to 8 mm wide. And if you wear a third ring, put it on the other hand: our guide to how many rings to wear suggests two or three in all, spread across both hands, one ring per finger.
The gym, the shower, and scans
- The gym. Samsung says to remove the Galaxy Ring when lifting or handling heavy, hard objects and not to wear it for exercises that use machines, and Oura suggests taking its ring off in situations that involve friction, such as weightlifting. Our guide to wearing a silver ring every day gives the band the same advice.
- Water. Both smart rings are water-resistant: the Oura Ring 5 to about 330 feet (100 meters), according to Notebookcheck, and the Galaxy Ring to 10 ATM, Samsung says. A sterling band is fine in the shower if you dry it; chlorine is what to keep it away from, as the same guide explains.
- MRI scans. Take both off. Facilities ask you to remove all jewelry, titanium included, as our guide to jewelry and MRI scans explains.
FAQ
Can you wear a smart ring and a wedding ring on the same finger?
You can, but Oura and Samsung both advise against it. The rings scratch each other, Oura warns that a ring right next to its own can cause uneven pressure and trap moisture against the skin, and the smart ring is meant to sit snugly at the base of the finger, where the band already is.
Which finger should a smart ring go on?
The index finger, if you follow Oura, which recommends it for the best accuracy and says the middle and ring fingers also work. Samsung’s sizing kit has pointed to the index finger too, though Samsung says tracking is the same on any finger.
Should I wear my smart ring on my left or right hand?
On your non-dominant hand, both Oura and Samsung say. For a right-handed man, that’s the left, the same hand as a wedding band in the US, so put the smart ring on the index finger, with the middle finger between it and the band. If you’re left-handed, wear it on your right index finger.
Will a smart ring scratch my wedding band?
It can. Oura warns that its ring “can itself scratch softer metal jewelry,” and a sterling silver band is soft. Keep a finger between them, and polish out fine scratches on the band with a silver cloth.
Is my smart ring size the same as my ring size?
Often not. Oura’s sizes differ slightly from standard US sizes, and Samsung says your usual size may not be the best fit because of the sensors inside. Smart rings are also wider than most bands, and the index finger runs about a size larger than the ring finger. Use the maker’s sizing kit for a full day and night.
Can a smart ring replace a wedding band?
It can, and Oura lists the ring finger among the fingers for its Ring 5. Just know that it comes off about once a week to charge, newer models keep arriving, and it can’t be resized like a metal band. Wearing both, with a finger between them, avoids those trade-offs.
Bottom line
Keep the band on your ring finger and put the smart ring on the index finger of the hand you use less. For most right-handed men, that’s both rings on the left hand, with a finger between them, which is where Oura’s and Samsung’s advice points. Don’t stack them or wear them side by side, size the smart ring with the maker’s kit rather than your band size, and if you want one ring to do both jobs, know that it will come off to charge and won’t last the way a band does.
From the collection
Men’s sterling silver rings by Ronatelli
Eleven handmade 925 rings, $129 to $169, from a chain-link band to a black onyx statement ring. Every one is adjustable.
Related guides
Wearing advice follows Oura’s support pages (choosing a size, product safety and use, ring finishes, and the Oura Ring 5 overview) and its Ring 5 announcement (May 28, 2026), and Samsung’s support pages (finding the right Galaxy Ring size, setting up and wearing the ring, materials and wearing precautions, and the Galaxy Ring overview); Samsung’s comments on finger choice follow SamMobile (October 2024). Ring 5 finishes follow Oura and TechCrunch (June 4, 2026), size ranges and the quote on smart ring bulk follow Engadget (May 28, 2026), and water resistance follows Notebookcheck (May 28, 2026); the Ring 4 announcement date follows DC Rainmaker (October 3, 2024). Band widths, sizing rules, scratch resistance, and care follow our own guides. All were checked on November 1, 2026. Read our editorial policy.
