Table of Contents
Oura Ring 5 in gold
The smallest smart ring Oura has built, finished in a gold that reads as jewelry instead of electronics.
This page walks through the ring the way an engineer would. It starts with the blueprint, then covers the finish, the sensors, the battery, the sizing and the price. Every drawing here is made in code.
The Amazon link opens in a new tab.
- Width
- 6.09 mm
- Thickness
- 2.28 mm
- Weight
- 4 g
- Body
- Titanium
- Water rating
- 5 ATM
- Battery
- About 1 week
A ring that finally disappears
For years the biggest complaint about smart rings was bulk. Oura’s health tracking earned respect, but the hardware was chunky enough that plenty of people stayed away. The Ring 5 is Oura’s answer.
Oura calls it the world’s smallest smart ring and says it is 40% smaller than the Ring 4. The width drops from 7.90 mm to 6.09 mm, and the thickness from 2.88 mm to 2.28 mm. TechCrunch’s reviewer had been wearing the Ring 4 Ceramic and noticed the difference straight away. The review expects the slimmer shape to win over people who skipped earlier models. Retail listings put the weight at 4 grams, in a titanium body that Oura says resists scratches better than before.
The blueprint
This is a schematic redrawn for this page from the published width and thickness figures. It is not an official Oura drawing, and the sensor positions are illustrative. The proportions are the point: the Ring 5 section (solid) sits inside the Ring 4 outline (dashed). Inner diameter depends on the size you order, from 6 to 13.
How much smaller is it?
Set the two rings side by side and the gap shows up in both dimensions. By simple arithmetic, the width falls by about 23% and the thickness by about 21%. Oura’s 40% figure is its own measure of overall size, so each single dimension shrinks by less than that.
The gold finish
Earlier gold Oura rings had a reputation for looking a little brassy. The Ring 5 gold is redesigned with a truer tone. TechCrunch’s reviewer says it lacks the yellow tinge of previous gold rings and feels closer to real gold jewelry. A price-tracking site’s summary says much the same and calls it less orange. It pairs easily with a watch, a bracelet or a wedding band.
Not everyone agrees. A small share of tagged buyer comments call the gold not gold enough, or cheap-feeling, so look at it in person if you can. The Ring 5 comes in six finishes.
What it measures
The Ring 5 carries the full Oura toolkit. A Swiss retailer’s listing names calories, cycle tracking, heart rate, oxygen saturation, steps, sleep, stress and temperature. It launched with two new software features, Blood Pressure Signals and Nighttime Breathing, which also reach the Ring Gen3 and later, so owners of older rings get them too.
Oura argues that signals are stronger on the finger than on the wrist. That is the company’s claim, so judge accuracy by independent testing, and watch trends rather than single readings. The charts below are sample shapes, not real data.
Sleep
Stages across the night.
Heart rate
Beats through the day and night.
Oxygen saturation
Blood oxygen as a steady line, not a spike.
Temperature
Drift from your own baseline.
Stress levels
Where the day sits on the scale.
Steps
Movement hour by hour.
Cycle tracking
A month in one ring.
Calories
Energy burned against your day.
Nighttime Breathingnew
Breathing patterns while you sleep.
Blood Pressure Signalsnew
A trend to watch, not a diagnosis.
Built for daily wear
A week between charges
Oura lists about a week of battery life, far longer than most smartwatches. Charge once a week during a shower or desk time and you keep your nights of data. A charging case, sold separately, holds up to five charges for travel.
Waterproof to 5 ATM
The ring is rated for 5 ATM, which covers showers and swimming. Gold can still pick up scuffs like any jewelry, so take it off for barbells, climbing and gardening.
Get the size right first
Oura says the ring needs its own sizing, different from jewelry sizes, and recommends the Ring 5 sizing kit before you buy. Retailers back this up. Coolblue credits the kit’s price toward the ring, and Argos gives a £10 code with its kit.
Wear the sizing ring for a full day, since fingers swell and shrink. Try it in the morning, after exercise and in the evening. Too loose gives poor readings, and too tight gets uncomfortable fast. Any finger works, and a retailer Q&A notes that a thumb is possible but not ideal for the most precise tracking.
Relative scale only. Use the real sizing kit for your size.
Price and subscription
Prices vary by market and retailer, and gold often costs more than the entry finishes. This table is a snapshot of listings I found, so check the current price before you buy. A subscription is part of the cost. A retailer Q&A confirms you need one for full use, and new members get the first month included.
| Source | Price | Notes |
|---|---|---|
| TechCrunch review, US | from $399 | Starting price across finishes |
| Amazon listing, US | $499 | Gold, size 8 |
| Argos, UK | £499 | Gold, size 12 listing |
| Coolblue, Europe | €529 gold €429 silver | Gold costs €100 more than silver |
Prices change by country and size. Amazon shows the current price for your region.
What’s in the box
Depending on the retailer, you get the ring, a size-specific charger, printed documentation and a USB-C to USB-C charging cable. Because the charger is sized to the ring, check you have the right one if you ever swap sizes.
What buyers say
Early feedback is strongly positive. One aggregator shows 17 Amazon reviews averaging 4.8 out of 5, with 88% giving five stars. The sample is small, so read the tags loosely. The sleep-tracking complaint is worth watching as more reviews arrive.
Praised
Criticized
The verdict
The gold Oura Ring 5 is the clearest sign that smart rings have grown up. It is smaller, lighter and finished in a gold that passes for jewelry, which removes the main objection people had to earlier models. Add a week of battery and broad health tracking, and it is easy to recommend to anyone interested in sleep and recovery.
The caveats are plain. Sizing needs care, the subscription adds ongoing cost, and a few buyers think the gold falls short of the marketing.
A good fit if you
- Want a tracker that looks like real jewelry
- Skipped smart rings because they felt bulky
- Care most about sleep and recovery
- Like a week of battery and no screen
Hold off if you
- Already own a Ring 4 and are happy with it
- Dislike monthly subscriptions
- Need notifications, GPS or a display
- Do heavy manual work that could scratch a finish
Make the most of it
- Wear it for two to three weeks so your baseline settles
- Pick one weekly charging slot and keep it
- Watch trends, not single numbers
- Re-check your size when the seasons change
Ready to try the gold Oura Ring 5?
Check the current price and which sizes are in stock on Amazon.
Figures come from TechCrunch’s Ring 5 review (June 2026) and retailer listings from Digitec, Coolblue, Argos and Altitude, plus a ShopSavvy review summary. Prices and stock change, so confirm them with the seller. All drawings are made in code for this page. Charts show sample shapes, not measurements, and the blueprint is a schematic, not an official drawing.