--- product_id: 724839096 title: "Ring 4 Size Kit - Size Before You Buy Oura Ring 4 - Unique Size, Not Standard US Ring Size - Receive Credit When Purchasing" brand: "oura" price: "MX$1091" currency: MXN in_stock: true category: "Oura" url: https://www.desertcart.mx/products/724839096-ring-4-size-kit-size-before-you-buy-oura-ring store_origin: MX region: Mexico --- # Ensures optimal sensor accuracy Custom sizing, not standard US sizes Fits all fingers, both hands Ring 4 Size Kit - Size Before You Buy Oura Ring 4 - Unique Size, Not Standard US Ring Size - Receive Credit When Purchasing **Brand:** oura **Price:** MX$1091 **Availability:** ✅ In Stock ## Summary > 📏 Nail your perfect fit before you buy — because precision matters! ## Quick Answers - **What is this?** Ring 4 Size Kit - Size Before You Buy Oura Ring 4 - Unique Size, Not Standard US Ring Size - Receive Credit When Purchasing by oura - **How much does it cost?** MX$1091 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/724839096-ring-4-size-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 - • **Wear It Your Way:** Designed to fit any finger on either hand, giving you ultimate flexibility and comfort. - • **Try Before You Commit:** Use the size kit for 24+ hours to confidently lock in your ideal ring size before purchase. - • **Exclusive Purchase Credit:** Buying the size kit applies credits toward your Oura Ring 4 purchase—smart shopping, no regrets. - • **Maximize Your Data Accuracy:** A perfect fit means your ring’s sensors deliver the most reliable health insights. - • **Precision Fit, Zero Guesswork:** Custom sizing tailored to Oura Ring 4’s unique scale—never settle for a generic fit again. ## Overview The Oura Ring 4 Size Kit is an essential tool for finding your exact ring size, as Oura Ring 4 uses a unique sizing system different from standard US ring sizes. Designed for all fingers and both hands, this kit ensures optimal sensor accuracy and comfort by helping you select the perfect fit. Wearing the ring on your index, middle, or ring finger is recommended for best results. The kit encourages a 24-hour trial to guarantee comfort and fit before committing to purchase. ## Description With the Oura Ring 4 Size Kit, you and those around you will find the perfect fit before purchasing. When you purchase the sizing kit you will automatically apply 10 credits to the Oura Ring 4 at checkout. Proper fit of the Oura Ring 4 ensures the highest possible data accuracy, comfort, and overall experience. Oura Ring 4 size is slightly different from the standard ring size, so it is important to use our tool to adjust your size and follow the size instructions. Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing the Oura Ring 4 on your index finger, middle finger, or ring finger ## Features - OURA RING 4 SIZE KIT - The Oura Ring 4 Size Kit is an ideal way to find the perfect size. Custom sizing allows you and those around you to find the perfect fit before purchasing - SIZE BEFORE PURCHASING - Oura Ring 4 size differs from the standard ring size. Determine your size with the Oura Ring 4 Size Kit. See "From Brand" section below for more information - NOT STANDARD SIZE - Oura Ring 4 sizes differ slightly from the standard ring size, so it's important to use our Oura Ring 4 Size Kit to determine your size. Oura Ring 4 is available in sizes 4-15. No half sizes - COMFORT AND ACCURACY - Proper fit Oura rings bring you the best data accuracy, comfort, and overall experience - CHOOSE YOUR FINGER - Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing the Oura Ring 4 on your index finger, middle finger, or ring finger. Fits the finger size you plan to wear the Oura Ring 4 - HOW TO FIT - The Oura Ring 4 fits securely and comfortably at the base of the finger. Do not spin the ring when performing normal daily tasks. We recommend wearing a ring sizer at least 24 hours to ensure the best fit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D9WVWXR1 | | Additional Features | Heart Rate Monitor, Activity Tracker, Sleep Monitor | | Amazon Bestseller | #49,524 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #97 in Standard Penis Rings | | Band Material Type | Stainless Steel | | Brand | OURA | | Built-In Media | Oura Ring 4 Size Kit | | Closure Type | Push back | | Color | Size Kit | | Compatible Devices | Smartphone | | Customer Reviews | 4.6 4.6 out of 5 stars (3,192) | | Manufacturer | Oura | | Model Number | JZ98-54870 | | Shape | Round | | Style Name | Size Kit | | Supported Application | Fitness Tracker, Sleep Monitor | | Wearable Computer Type | Smart Ring | ## Product Details - **Brand:** OURA - **Color:** Size Kit - **Shape:** Round - **Special Feature:** Heart Rate Monitor, Activity Tracker, Sleep Monitor - **Style:** Size Kit ## Images ![Ring 4 Size Kit - Size Before You Buy Oura Ring 4 - Unique Size, Not Standard US Ring Size - Receive Credit When Purchasing - Image 1](https://m.media-amazon.com/images/I/518Qh+G3I5L.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 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.mx/products/724839096-ring-4-size-kit-size-before-you-buy-oura-ring](https://www.desertcart.mx/products/724839096-ring-4-size-kit-size-before-you-buy-oura-ring) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-05-29*