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Oura JZ90-54217-10 Ring 4

The Oura Ring 4 is a smart ring that tracks over 50 health metrics, including sleep, activity, and heart rate. With Smart Sensing adaptive technology and a no-screen, vibration-free design, it provides continuous health insights without distractions. It features an all-titanium, water-resistant construction for 24/7 comfortable wear. The ring delivers up to 8 days of battery life, requires the Oura sizing kit for accurate fit, and includes a 1-month membership trial for personalized guidance via the Oura App on iOS and Android.

  • 7 variants
  • Tracks 50+ health metrics
  • Size: 4 variants
New prices €292 – €344
Used prices €172 – €257
Price spread ~18% Across new variants
Customer rating 4.0 9,121 ratings

Available variants (7)

Choose a variant, then open its detail page for seller-specific information.

Grid Compare
Ring 4 — Smart Ring, Oura

Silver, Size 8

Amazon
Price €300.48
Updated Sep 1, 2026
Available to order
Width
0.9842519675 in
Length
0.9842519675 in
Size
8
View variant
Ring 4 Silver Size 10 — Smart Ring, Oura

Silver, Size 10

Amazon
Price €291.86
Updated Sep 2, 2026
Available to order
Width
1.0629921249 inches
Length
1.0629921249 inches
Size
10
View variant

Silver, Size 9

Amazon
Price €300.48
Updated Aug 27, 2026
Available to order
Width
1.0236220462 inches
Length
1.0236220462 inches
Size
9
View variant
Health & Fitness Smart Ring — Smart Ring, Oura

Silver, Size 11

Amazon
Price €291.86
Updated Sep 2, 2026
Available to order
Width
1.1023622036 inches
Length
1.1023622036 inches
Size
11
View variant
Ring 4 - Black - Size 11 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You... — Smart Ring, Oura

Black, Size 11

Amazon
Price €300.48
Updated Aug 31, 2026
Available to order
Width
1.1023622036 inches
Length
1.1023622036 inches
Size
11
View variant
Ring 4 - Stealth - Size 11 — Smart Ring, Oura

Stealth, Size 11

Amazon
Price €300.48
Updated Aug 6, 2026
Available to order
Width
0.9842519675 inches
Length
0.9842519675 inches
View variant

Variant comparison

Compare prices, availability, and key variant differences in one table.

Feature Gold, Size 8 Silver, Size 8 Silver, Size 10 Silver, Size 9 Silver, Size 11 Black, Size 11 Stealth, Size 11
Price €343.52 €300.48 €291.86 €300.48 €291.86 €300.48 €300.48
Updated Aug 25, 2026 Sep 1, 2026 Sep 2, 2026 Aug 27, 2026 Sep 2, 2026 Aug 31, 2026 Aug 6, 2026
Availability Available to order Available to order Available to order Available to order Available to order Available to order Available to order
Width 0.8661417314 inches 0.9842519675 in 1.0629921249 inches 1.0236220462 inches 1.1023622036 inches 1.1023622036 inches 0.9842519675 inches
Length 0.8661417314 inches 0.9842519675 in 1.0629921249 inches 1.0236220462 inches 1.1023622036 inches 1.1023622036 inches 0.9842519675 inches
Size 8 8 10 9 11 11 —
Color Gold Silver Silver Silver Silver Black Stealth
Health Metrics Sleep, Activity, Women's Health, AI Advisor, Stress, Heart Health, Metabolic Health Sleep, Activity, Stress, Heart Health, Metabolic Health, Women's Health Tracks over 50 metrics including sleep, activity, stress, heart health, women's health Sleep, Activity, Stress, Heart Health, Metabolic Health, Women's Health Tracks over 50 health metrics including sleep, activity, stress, heart health, metabolic health, and women's health — —
Model Oura Ring 4 Ring 4 Oura Ring 4 Oura Ring 4 Oura Ring 4 — 4
Height 0.2755905509 inches 0.2755905509 in 0.2755905509 inches 0.2755905509 inches 0.2755905509 inches 0.2755905509 inches 0.3149606296 inches
Membership First month included, then $7.99/month First month free, then $7.99/month — First month free, then $7.99/month First month free for new members, then $7.99/month — First month free, then $7.99/month

Amazon live offers

Offers updated

22 live offers
Top live offer €291.86
New from €291.86
Used from €172.18
Offer count 22+
Seller Condition Price Shipping Updated
Third-party seller Used - Acceptable €172.18 Free shipping 8/31/26 View offer
Third-party seller Used - Acceptable €197.16 Free shipping 9/2/26 View offer
Third-party seller Used - Like New €241.06 Free shipping 9/2/26 View offer
Third-party seller Used - Like New €257.43 Free shipping 9/2/26 View offer
Third-party seller Used - Like New €257.43 Free shipping 8/27/26 View offer
Third-party seller Used - Like New €257.43 Free shipping 8/31/26 View offer
Third-party seller Used - Like New €275.50 Free shipping 8/31/26 View offer
Third-party seller New €291.86 Free shipping 9/2/26 View offer
Third-party seller New €291.86 Free shipping 9/2/26 View offer
Third-party seller New €295.30 Free shipping 8/27/26 View offer
Amazon View all offers on Amazon
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Overview

Compare Oura JZ90-54217-10 Ring 4 variants, pricing tiers and key differences.

Learn more

How variants differ

  • Width
  • Length
  • Size

Who each variant is for

  • Start with your budget: the visible price spread across variants is about 18%.

Reviews

4.0 / 5 from 9,121 ratings
No written reviews yet

When this device makes sense

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Product confidence

Reviews

4.0
(9,121 ratings)

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