--- product_id: 717690620 title: "Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase" brand: "oura" price: "£22.65" currency: GBP in_stock: true reviews_count: 6 category: "Oura" url: https://www.desertcart.co.uk/products/717690620-ring-4-sizing-kit-size-before-you-buy-oura-ring store_origin: GB region: United Kingdom --- # Optimizes Oura Ring 4 data accuracy Instant $10 credit on purchase Precision sizing for perfect fit Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase **Brand:** oura **Price:** £22.65 **Availability:** ✅ In Stock ## Summary > 📏 Fit First, Track Best — Don’t Settle for Less! ## Quick Answers - **What is this?** Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase by oura - **How much does it cost?** £22.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/717690620-ring-4-sizing-kit-size-before-you-buy-oura-ring) ## Best For - oura enthusiasts ## Why This Product - Trusted oura brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Exclusive $10 Credit:** Sizing kit purchase automatically applies a $10 credit toward your ring checkout. - • **Comfort Meets Precision:** Wear the sizer 24+ hours to confirm a secure, comfortable fit that won’t slip or rotate. - • **Optimized Health Tracking:** Proper fit maximizes sensor accuracy for superior sleep, activity, and readiness insights. - • **Tailored Fit, No Guesswork:** Custom sizing kit ensures your Oura Ring 4 fits flawlessly before you buy. - • **Universal Finger Compatibility:** Designed for any finger on either hand, with recommended fingers for peak performance. ## Overview The Oura Ring 4 Sizing Kit is a precision tool designed to help you find the perfect ring size before purchase, ensuring maximum comfort and sensor accuracy. It features unique sizing distinct from standard rings, works on all fingers, and includes a $10 credit redeemable toward your Oura Ring 4 purchase. Wearing the sizer for at least 24 hours guarantees a secure fit that enhances your wearable experience. ## Description The Oura Ring 4 Sizing Kit allows for you and those around you to find the ideal fit before purchasing. With a sizing kit purchase, a 10 credit will automatically be applied to your Oura Ring 4 at checkout. A properly fitting Oura Ring 4 will result in the highest possible data accuracy, comfort, and overall experience. Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our tools and to follow our sizing instructions. Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger. Review: Good - Good Review: かぶれた - 後で判明したがアマゾンとその他で1000円近く値段が違う。類似の商品にも出て来なかった。 ２４時間装着とあったので着けて寝たら、かぶれでしまった。本商品とは素材が違うが、高いので怖くて買えない ## Features - OURA RING 4 SIZING KIT - The Oura Ring 4 Sizing Kit is the ideal way to find the perfect size. It’s a custom sizer that allows for you, and those around you, to find the perfect fit before purchasing - SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit. For additional details, see “From the brand” section below - NOT STANDARD SIZING - Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our Oura Ring 4 Sizing Kit. Oura Ring 4 is available in sizes 4-15. There are no half sizes - COMFORT AND ACCURACY - A properly fitting Oura Ring will result in the highest data accuracy, comfort, and overall experience - CHOOSE A FINGER - Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger. Size the exact finger you plan to wear your Oura Ring 4 on - HOW IT SHOULD FIT - Oura Ring 4 should fit securely and comfortably at the base of your finger. Your ring should not rotate as you go about normal daily tasks. We recommend wearing your ring sizer for at least 24 hours to confirm your best fit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D9WVWXR1 | | Additional Features | Unique Sizing Kit with Fit Credit | | Band Material Type | Stainless Steel | | Best Sellers Rank | #38,309 in Fashion ( See Top 100 in Fashion ) #38 in Ring Sizers | | Brand | OURA | | Built-In Media | Oura Ring 4 Sizing Kit | | Color | Sizing Kit | | Colour | Sizing Kit | | Compatible Devices | Smartphone | | Customer Reviews | 4.6 out of 5 stars 3,277 Reviews | | Display Type | No Display | | GPS | No GPS | | GPS Geotagging Functionality | No GPS | | Manufacturer | Oura | | Model Number | JZ98-54870 | | Shape | Round | | Special features | Unique Sizing Kit with Fit Credit | | Style | Sizing Kit | | Style Name | Sizing Kit | | Unit Count | 1 Count | | Wearable Computer Type | Smart Ring | ## Product Details - **Brand:** OURA - **Colour:** Sizing Kit - **Compatible devices:** Smartphone - **Shape:** Round - **Style:** Sizing Kit ## Images ![Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase - Image 1](https://m.media-amazon.com/images/I/518Qh+G3I5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by S***R on 2 July 2025* Good ### ⭐⭐ かぶれた *by A***ー on 9 September 2025* 後で判明したがアマゾンとその他で1000円近く値段が違う。類似の商品にも出て来なかった。 ２４時間装着とあったので着けて寝たら、かぶれでしまった。本商品とは素材が違うが、高いので怖くて買えない ### ⭐ Oura Ring cannot be delivered to some locations. *by F***G on 1 March 2025* Great sizing tool. However, Amazon SG doesnt allow the actual Oura Ring to be delivered. The status has been “Ordered Received…” ## Frequently Bought Together - Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase - Oura Ring Gen3 Sizing Kit - Size Before You Buy The Oura Ring Gen3 - Unique Sizing - Receive Credit for Purchase - RingConn Gen 2 Air Sizing Kit - Size First Before You Buy - Choose from 9 Sizes - Sizes 6 to 14 - Only Smart Ring --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/717690620-ring-4-sizing-kit-size-before-you-buy-oura-ring](https://www.desertcart.co.uk/products/717690620-ring-4-sizing-kit-size-before-you-buy-oura-ring) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-01*