DESIGNER'S TABLE

No ruler, no ring sizer. Rest your finger on your phone screen, or lay a ring you already own on it, and get your ring size. It's free, and you don't need an account. ■ Measure with your finger Rest your finger between the two lines and match them to the base of your finger — the narrowest part, where a ring sits. Fingers are soft, and their width shifts a little with pressure and viewing angle, so you get a recommended size with a range of one size either way. Measure your knuckle too and it narrows to a single size. A ring has to slide over the knuckle, so if yours is thicker than the base, the app picks the right size in between. ■ Measure a ring you own If you have a ring that fits, this is the most accurate way. Place it on the circle and match the circle to the inside of the ring. You get the size along with the US size and the inner diameter in millimeters. Buying a ring as a…