Purchase the gifting kit and a Best Buy gift card with your desired value (gift card sold separately) Let the recipient buy the correct size and preferred finish of their Oura Ring 5 Your friend or loved one will size themselves and then purchase their Oura Ring 5 using the gift card For best results, wear the ring sizer for 24 hours as your fingers can expand and contract based on environmental factors The sizer ring should not rotate as you go about normal daily tasks