Find your ring size by first measuring the circumference of your finger using a tape or a piece of paper. Then compare the length of the tape to a size chart to see your ring size.
Start by measuring the circumference of your finger with a non-stretchable tape or paper. Do not pull the tape too tight.
When the tape fits well, mark the spot where the tape overlaps, for example with a marker. Remember, do not pull the tape too tight.
Straighten the tape and measure its length in millimeters. Compare the millimeters to the 'ring circumference' section of the size chart to find your ring size.
Size chart
From the size chart, you can see the ring's inner circumference in millimeters and the ring's diameter in millimeters. Based on these, you can determine your ring size. If your finger's circumference is 51mm, your ring size would be 16. If you are between sizes, we recommend choosing the larger size.
From the size chart, you can also convert your ring size to EU standard size and US standard size. When selecting a size on the product card of the ring, you can see in what format the size is listed.
Ring circumference (mm)
Ring diameter (mm)
Ring size
EU-size
37.8
12.04
12.0
38
39.1
12.45
12.5
39
40.4
12.85
13.0
40
41.7
13.26
13.0
42
42.9
13.67
13.5
43
44.2
14.07
14.0
44
45.5
14.48
14.5
45
46.8
14.88
15.0
47
48.0
15.29
15.0
48
48.7
15.49
15.5
49
50.0
15.9
16.0
50
51.2
16.31
16.0
51
52.5
16.71
16.5
52
53.8
17.12
17.0
54
55.1
17.53
17.5
55
56.3
17.93
18.0
56
57.6
18.34
18.0
58
58.9
18.75
18.5
59
60.2
19.15
19.0
60
61.4
19.56
19.5
61
62.7
19.96
20.0
63
64.0
20.37
20.0
64
65.3
20.78
20.5
65
66.6
21.18
21.0
67
67.8
21.59
21.5
68
68.5
21.79
22.0
69
These tips will help you succeed
How do I ensure that the ring is the right size?
By using an appropriate ring sizer, you can get a significantly more accurate measurement and be sure that the ring you order is the right size. If you measure your size at home with a tape, for example, the result may be very approximate and not necessarily correct.
It’s good to remember that the time of measurement also affects the size of your fingers.
Measure your finger at the end of the day, when your fingers are at their largest.
It's best not to measure your fingers in cold weather, as their circumference may have shrunk somewhat.
Alcohol and salt can also cause your fingers to swell, so take this into account when measuring.
If you are measuring at home, it's advisable to use a tape of the same width as the ring you are considering.
What is the most common ring size for men?
The most popular ring size for men is between 18-21. However, it's important to note that this shouldn't solely dictate your purchasing decision. It's crucial that the ring fits perfectly on the finger, so it's better to measure your own and your partner's finger to ensure you get the right sizes.
What is the most common ring size for women?
The most popular ring size for men is between 15-18. However, it's important to note that this shouldn't solely dictate your purchasing decision. It's crucial that the ring fits perfectly on the finger, so it's better to measure your own and your partner's finger to ensure you get the right sizes.
Are men's and women's sizes the same?
Yes. Sizes may be indicated differently, but men's and women's sizes are always the same.
How do you know your partner's ring size?
You can find out your partner's ring size in a few different ways. Here are a few options:
Ask your partner's friend. Often, a friend knows your partner's ring size and possibly even the style of ring your partner prefers.
If your partner wears rings, you can measure the size of an existing ring. Measure the inner diameter of the ring and compare the measurement to our size chart. Remember that the ring must be one worn on the ring finger.
Measure your partner's finger. This can be done casually or, for example, while your partner is sleeping. Then just compare the measurement to our size chart.
Ultrahuman Ring Air - a compact smart ring for a healthy life
Ultrahuman Ring Air smart ring's advanced sensors and seamless Ultrahuman app allow you to measure and optimise your health, activity, recovery and monitor the quality of your sleep like never before. The outer surface of the ring is made of destructible titanium reinforced with a tungsten carbide coating, making it resistant to everyday wear and tear. The inner surface of the ring is coated with medical-grade, hypoallergenic epoxy resin and weighs only 2.4 to 3.6 g (depending on the size of the ring), ensuring unrivalled comfort. The ring has a water resistance of 100m/10atm, meaning you can carry it with you in the shower and while swimming. Battery life is 4-6 days on a full charge, depending on the size of the ring, and a full charge with the included charging pad is possible in 90-120 minutes. Ultrahuman Ring Air is compatible with iPhone devices running iOS 15 or later and Android devices running Android 6 or later. You get automatic firmware updates through the Ultrahuman app, and using Ring Air requires no recurring subscription fees, giving you lifetime access to the personal information you provide with your ring.
Accurate health monitoring 24/7
Take advantage of Ultrahuman Ring Air's cutting-edge passive and preventative health monitoring features to put yourself on the path to extended vitality and your quest for a longer, healthier life. The ring features full-time heart rate monitoring, HRV monitoring, temperature monitoring and for women, menstrual cycle monitoring. Dynamic Recovery analyses key physiological signals in real time, telling you how sleep, stress, skin temperature and HRV are affecting your body's recovery. Improve your recovery with regular rest and breathing techniques. The ring also discreetly monitors your heart rhythm and adaptability every night and detects early signs of atrial fibrillation. Enjoy seamless, nightly monitoring and receive daily medical reports for peace of mind.
Comprehensive sleep monitoring
Discover the key to better sleep with Ultrahuman Ring Air, designed as a comprehensive sleep monitor. The ring detects sleep debt, morning wakefulness and tossing and turning during sleep and aims to help you better understand your sleep and give you the information you need to make lifestyle changes. It assesses your total sleep duration, resting rate and restfulness, and your daily sleep score shows how well you are rested. The Sleep Score score is based on 11+ different sleep elements and the time spent in different sleep stages. The maximum sleep score is 100, against which you can compare your own sleep score. Track your sleep stages, unlock customized tools for better nights and learn what affects the quality of your sleep.
Key features of the Ring Air smart ring:
Unmatched accuracy:Fingers provide more accurate biomarker data than wrists due to greater blood flow and arterial density.
11x lighter:Compared to typical smartwatches, the Ring Air smart ring weighs only 2.4 to 3.6 grams (depending on ring size).
Stimulant window:Stimulant tracking is designed to detect and optimize the consumption of stimulants such as caffeine, improving productivity and sleep management.
Recovery score: a score that helps understand body metrics such as stress based on body signals such as heart rate, HRV and body temperature.
Movement Index: a movement index that keeps the user moving to achieve optimal glucose metabolism and increases energy expenditure outside of exercise.
Other features:
Calculation of aceles
24/7 heart rate monitoring, heart rate variability monitoring and skin temperature monitoring
Monthly cycle monitoring
Calories and calories
VO2 Max
Flight status
My Phone app
Infrared photoplethysmography (PPG) sensor
6-axis motion sensors
Red LEDs (heart rate and oxygen saturation)
Green LEDs (heart rate measurement)
Infrared LEDs (heart rate measurement)
Technical specifications:
Sizes: 5 - 14
Width: 8.1 mm
Thickness: 2.45 - 2.8 mm (depending on ring size)
Weight: 2.4 - 3.6 g (depending on ring size)
Materials: titanium, epoxy resin
Protected against electromagnetic fields
Automatic firmware updates via the Ultrahuman app
Battery life: 4-6 days on a full charge depending on the size of the ring. Full charge of the ring in 90-120 minutes
Connection: Bluetooth BLE5 (Bluetooth Low-Energy)
.
Compatibility: iOS 15 or later / Android 6 or later
.
Operating temperature: -5 - +50 °C
or higher.
Resistance: 100m/10atm
Ultrahuman Ring Air smart ring comes with a one-year warranty and is shipped in the manufacturer's original packaging. The package includes the Ultrahuman Ring Air smart ring, Ring AIR charging pad and USB-C cable.
Ask for an offer or more information about the product
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