--- product_id: 728323895 title: "Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4" price: "€ 18.73" currency: EUR in_stock: true url: https://www.desertcart.fi/products/728323895-oura-ring-4-sizing-kit-size-before-you-buy-oura store_origin: FI region: Finland --- # Optimizes Oura Ring 4 data accuracy Precision sizing for perfect fit Fits all fingers, any hand Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 **Price:** € 18.73 **Availability:** ✅ In Stock ## Summary > 📏 Nail your perfect fit before you commit—because precision is the new luxury. ## Quick Answers - **What is this?** Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - **How much does it cost?** € 18.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/728323895-oura-ring-4-sizing-kit-size-before-you-buy-oura) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Exclusive Credit Bonus:** Get $10 credit toward your Oura Ring 4 purchase when you size up first. - • **Comfort Meets Confidence:** Sizing kit mimics titanium ring feel to guarantee all-day comfort and no rotation. - • **Data Accuracy Starts Here:** A snug fit maximizes sensor precision for next-level health insights. - • **Perfect Fit, Zero Guesswork:** Custom sizing kit ensures your Oura Ring 4 fits flawlessly before you buy. - • **Universal Finger Compatibility:** Wear your Oura Ring 4 on any finger—index, middle, or ring—for optimal results. ## Overview The Oura Ring 4 Sizing Kit is a precision tool designed to help you find the exact size for your Oura Ring 4, which uses non-standard sizing. By ensuring a secure, comfortable fit on your chosen finger, it enhances the ring’s sensor accuracy and overall user experience. The kit fits all fingers and includes a $10 credit toward your ring purchase, making it an essential step for anyone serious about optimizing their wearable health tech. ## 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. ## 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 - MATERIALS - Our sizing rings are made of plastic, while the Oura Ring 4 is crafted in full titanium for comfort. Due to the plastic mold used to make our ring sizers, they may seem less comfortable than the actual Oura Ring you’ll end up receiving. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DWFSW47F | | Color | Sizing Kit | | Customer Reviews | 4.5 4.5 out of 5 stars (1,459) | | Date First Available | February 28, 2025 | | GPS | No GPS | | Item Weight | 0.019 ounces | | Item model number | JZ98-54867 | | Manufacturer | Oura | | Other display features | Wireless | | Product Dimensions | 5.51 x 5.51 x 0.98 inches | | Whats in the box | Oura Ring 4 Sizing Kit | ## Images ![Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Image 1](https://m.media-amazon.com/images/I/31SY7rqvZYL.jpg) ![Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Image 2](https://m.media-amazon.com/images/I/419nmKaZfRL.jpg) ![Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Image 3](https://m.media-amazon.com/images/I/41CLht8RuZL.jpg) ![Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Image 4](https://m.media-amazon.com/images/I/611YGgDMh9L.jpg) ## 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 for Heritage and Horizon Rings-Measure Sizes 6-13 for Fit Before Purchasing, Sizes are Unique to Oura --- ## 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.fi/products/728323895-oura-ring-4-sizing-kit-size-before-you-buy-oura](https://www.desertcart.fi/products/728323895-oura-ring-4-sizing-kit-size-before-you-buy-oura) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-09-27*