THERES AN APP FOR THAT! The free downloadable Ring Sizer app is both accurate and simple to useyou cant go wrong.Its as simple as this. You can find out what ring size you need in measurements for the UK, EU, or the USA. All sizes can then be determined accurately and easily.Place the persons existing ring on your smart phone screen that has had the Ring Sizer app downloaded. Now, adjust the circle until its an exact fit of the inside of the ring. This handy Ring Sizer allows you to keep your ring gift a secretwhether its the engagement ring or any other special ring as a gift. You keep the surprise a secretwithout making an unnecessary trip to the jeweler.Maybe youre not sure how to download the free Ring Sizer app. No problem. All you have to do is fill in the simple form with your details below, and register for our e-newsletter too. Then well send you a link to download the Ring Sizer app.