Oura Ring 5 Review: 9 Days of Real Battery Life and How It Actually Wears

The Oura Ring 5 is worth buying.

It's Oura's latest smart ring, released on June 4, 2026, starting at $399 (Black / Silver). Compared to the previous Oura Ring 4 it's about 40% smaller, down to 6.09mm wide, 2.28mm thick, and 2g and up. It's water resistant to 100m, and Oura rates the battery at 6–9 days.

On paper that reads like a modest update. Put it on your finger and the impression changes. This is the generation where Oura went all-in on making you forget the ring is there.The catch is that the hardware is only half the cost — there's a $5.99/month membership on top, and you need to make peace with that before you buy.

I bought one at launch and have worn it for about a month and a half. Instead of reading the spec sheet back to you, I want to talk about how it actually fits into daily life after the purchase.

Oura Ring 5 specs and features

First, the numbers. I'm keeping them in a table, so you can skip it and the rest of the review still makes sense.

The size numbers are the ones that matter. About 40% smaller than the Ring 4, 2.28mm thick, starting at 2g.Then there's the price, which is a two-story building: $399 for the ring plus $5.99 a month. Miss that second floor and it trips you up later.

There are six colors but only two price tiers. Black and Silver are $399; Stealth, Brushed Silver, Gold, and Deep Rose are $499 — exactly $100 more.

What a month and a half with the Oura Ring 5 taught me

You forget you're wearing it — but you do have to pick the right finger

I own the Ring 4 too, so I can say this with some confidence: the Ring 5 is noticeably thinner. It feels about half the weight, too. For everyday wear, I basically stop noticing it.

That said, with a smart ring, which finger you wear it on changes the experience. No other gadget really has that variable.

My default is the right index finger. That's where it sits best. I hold my phone in my left hand, and with the ring on my index finger it does bump the phone a little while I'm using it. You get used to it, but it's not zero.

The middle finger, on the other hand, feels cramped between the index and ring fingers. Finger thickness and the gaps between them vary from person to person, so this is one of those things you can't know until you actually try it.

The one exception is my weekly gym session. When I'm holding dumbbells, the ring on my index finger hits the bar, so I move it to my middle finger just for that. Swapping takes a couple of seconds, so it's a workflow problem, not a product problem.

The scores and activity detection matched how I actually felt

Accuracy is the biggest worry with any smart ring. Short version: I had no complaints about the Ring 5's.

Sleep score, Readiness score, heart rate — all of them line up closely with how I felt.On days I thought "I'm unusually tired today," the score was low. On good days the numbers were up. When a device gets this wrong, you stop looking at the numbers entirely, so it really matters.

Activity detection was accurate as well. Sleep, walks, and strength training all got picked up properly.It even logged when I left for lunch and when I got back, which made me laugh a little. My weekly personal training session gets correctly tagged as strength training too.

Not having to hit a "start recording" button makes a real difference in whether you stick with it. I'm the kind of person who forgets to press the button.

I ran it from 100% to dead: almost exactly 9 days

The official rating is 6–9 days. Numbers like that are usually generous, so I timed it from a full charge until it died.

It made it nearly 9 days. The top of the range, as advertised. Battery life is not something you need to be skeptical about here.

Charging takes about 80 minutes. I drop it on the charger while I'm in the shower, which means I never actually wait for it to charge. I take it off then anyway — I just take it off onto the charger. I've more or less stopped thinking about the battery.

The only times I take it off: showering and sunscreen

After a month and a half, taking the ring off has narrowed down to two situations: the shower, and putting on sunscreen.

With sunscreen, the cream works its way in between the ring and my finger and feels gross, so I take it off first.

I leave it on for handwashing. It's water resistant to 100m, so there's nothing to worry about. If I had to take it off every time I washed my hands, the whole routine would collapse in about three days.

The one trap is right after a shower: I forget to put it back on.

The fix is to set the ring on top of my phone. I touch my phone dozens of times a day, so I always notice it. Since I started doing that, I haven't forgotten once.

So, does it scratch?

It's titanium with an ultra-hard PVD coating, and after a month and a half of wearing it constantly — handwashing included — there are no scratches I can notice.

The body is so slim that even if it did pick one up, I doubt it would show. I bought the glossy Black, and it still hasn't bothered me.

Sort out sizing before you order

The Ring 5 comes in sizes 6 through 13. I already knew my size from the Ring 4, but if this is your first smart ring, sizing is the first hurdle.

The process is simple: when you order from Oura's store, choose the "size before you buy" option. A free sizing kit ships to you first, and you confirm your size after measuring your finger with it. Worth knowing: Oura's sizes aren't standard US ring sizes, and there are no half sizes, so an existing ring you own isn't a reliable guide.

Finger size shifts with the time of day and how your body is doing, so this isn't something to eyeball.

Oura's own store doesn't sell the sizing kit as a standalone item — it ships as part of the order. Amazon and Walmart do sell it separately, and it comes with a credit toward your ring purchase, so that's the route if you want to size up before you commit to buying a ring.

If the size ends up wrong, support can help, so it's not a dead end — it just delays getting the ring on your finger. The sooner you want to start using it, the more it pays to measure first.

What to know before you buy

The $5.99/month subscription — and what you get without it

This is the real downside. On top of buying the hardware, the Oura Membership costs $5.99 a month ($69.99 a year, first month free).

Honestly, it stings. That's $69.99 every year, forever.But it's easier to decide once you know exactly where the line falls, so here's the breakdown.

So if all you want is a daily glance at the three scores, you can get by without paying.

But the automatic activity detection I praised earlier, and any analysis that goes as deep as sleep stages, sit on the paid side.If you're buying this to seriously improve your sleep, budget for the membership. The first month is free, so use it for a month and then decide.

Picking a color costs an extra $100

Black and Silver are $399. Stealth, Brushed Silver, Gold, and Deep Rose are $499. That's a $100 gap.

I actually wanted the Stealth, but paying $100 purely for the finish was more than I could talk myself into.

I went with Black and don't regret it. The surface is glossy, but scratches and fingerprints haven't been an issue, so in practical terms nothing has bothered me in a month and a half. If you don't care much about color, that $100 covers a full year of membership with change left over, which buys you a lot more experience.

Depending on the finger, it hits your phone or gym equipment

As I mentioned in the fit section, the ring can knock against the phone in your hand or against gym equipment.

Moving it to another finger for those moments solves it. It's thin and light enough now that swapping is barely an inconvenience.

Where it shines

Overnight: This is the main event. You don't notice you're wearing it, so there's no barrier to sleeping in it. The next morning your Sleep and Readiness scores are waiting, and they actually match how you feel. That's why I open the app every morning.

Weekly gym sessions: My personal training session got correctly logged as strength training. On dumbbell days I move the ring to my middle finger.

Lunch runs: It recorded when I left and when I came back with real accuracy. Even ordinary movement gets picked up.

Handwashing and anything wet: 100m water resistance means you never take it off at the sink. For a device meant to stay on, that mattered a lot.

Shower time: Take it off, put it on the charger. It's done in about 80 minutes, so it's nearly full by the time I've showered and brushed my teeth. Then it goes on top of my phone so I don't forget to put it back on.

How does it compare to the Oura Ring 4?

I own the Ring 4, so a quick note on that.

The Ring 5's body is dramatically slimmer and feels about half the weight. On paper, roughly 40% smaller than the Ring 4.You can tell the moment you pick it up — this isn't an "oh yeah, now that you mention it" refresh.

Whether Ring 4 owners should upgrade is a bigger question that involves the feature set too, and I'll cover it properly in a separate comparison.This review is for people buying their first Oura Ring. And as a first ring, starting with something this thin and light is genuinely enviable.

Verdict: the Oura Ring 5 is for people who want to see their sleep in numbers

After a month and a half, I'm glad I bought it — not just for the sleep data, but because daily activity gets visualized too, and you get health guidance on top of it.

Buy it if you

• Have concerns about your sleep and want the current state in numbers first
• Can't stand wearing a smartwatch to bed
• Want to think about charging as little as possible (I measured nearly 9 days)
• Reliably forget to hit the record button (auto-detection is accurate)
• Don't want to remove a device to wash your hands (100m water resistant)

Skip it if you

• Refuse to pay $5.99 a month (the three scores work without it, but the good stuff is behind the membership)
• Dislike having anything on your fingers
• Already use an Oura Ring 4 and aren't bothered by its size or weight

There's exactly one thing to do before you buy: choose "size before you buy" at checkout and measure your finger with the free sizing kit. After that you just wear it and the data piles up on its own.

One last thing, and this isn't specific to the Oura Ring 5. If your sleep is a problem, start measuring it with something — a smart ring, a watch, whatever.Without data, you can't tell whether anything you change is working.

A month and a half of wearing it nonstop, and there wasn't a single moment I wanted it off. That's my answer.