EUC. Can’t wear because I bought it for my mom and it was too big. It says size 7 but it can’t be correct, it’s more like an Oura size 8. As you can see the app and ring are registered only to show everything is operational but once purchased I will de register /deactivate my account. Fraction of the price because my mom took too long to let me know she didn’t want it. My friend has an Oura size 7 and this one is too big, we compared it to her Oura sizer ring for an 8 and it measures an 8. Questions welcome.