Sizing Kit Compatible with Oura Ring 5, Smart Ring Sizer Measuring Tool

Choose your smart ring size with greater confidence using this sizing kit compatible with Oura Ring 5. The complete ring sizing kit includes sizes 6 through 13, allowing you to compare different fits before purchasing your smart ring. Because Ring 5 sizing may differ from standard jewelry ring sizes and previous-generation sizing, using a corresponding ring measurer and ring sizer can help reduce uncertainty when selecting your size. For a more accurate fit check, wear the ring sizer measuring tool on the exact finger and hand where you plan to wear your smart ring. Test the fit during normal daily activities and overnight, as finger size may change throughout the day. The best-fitting ring sizer should sit securely and comfortably at the base of your finger without rotating freely, slipping off or creating excessive pressure. Each sample ring is clearly marked for quick size identification. Lightweight, reusable and easy to carry, this ring sizer is a practical accessory for checking your fit at home before ordering. Please note that this product is a sizing tool only and does not include a smart ring.

• SIZE BEFORE ORDERING: Use this ring sizing kit compatible with Oura Ring 5 before choosing your smart ring. Gen 5 sizing may differ from standard jewelry sizes and Gen 4 sizing, so testing the fit first helps reduce the risk of selecting the wrong size.
• COMPLETE SIZE 6–13 SET: This ring measurer and ring sizer includes sizes 6 through 13, with no half sizes. Try each sample ring to compare the fit and identify the most suitable size for your preferred finger.
• BETTER COMFORT AND TRACKING: This ring sizer measuring tool helps you select a size that feels snug without being overly tight, supporting a more comfortable wearing experience and consistent sensor contact.
• TEST YOUR PREFERRED FINGER: The ring can be worn on either hand and on different fingers. Use the ring sizer on the exact finger where you plan to wear your smart ring. The index, middle and ring fingers are commonly selected for a stable and comfortable fit.
• TEST DURING DAILY ACTIVITIES: Wear the ring sizer while working, sleeping, exercising or completing everyday tasks. Checking the fit at different times helps account for normal changes in finger size throughout the day.