Photo 1 of Oura Ring 4 Sizing Kit,Oura Ring 4 Sizer,Measure Your Finger Size Before Buying a Ring,Size 4/5/6/7/8/9/10/11/12/13/14/15

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Photo 1 of Oura Ring 4 Sizing Kit,Oura Ring 4 Sizer,Measure Your Finger Size Before Buying a Ring,Size 4/5/6/7/8/9/10/11/12/13/14/15Photo 2 of Oura Ring 4 Sizing Kit,Oura Ring 4 Sizer,Measure Your Finger Size Before Buying a Ring,Size 4/5/6/7/8/9/10/11/12/13/14/15