While you may wear one size in the u.k., your sizing in the states may be completely different. Measure the string or paper against a ruler. Use a ruler or measuring tape inches to carefully.
Place credit card here to confirm print size option 1: Size 1 39.1 mm size 1.5 40.4 mm size 2 41.6 mm size 2.5 42.9 mm size 3 44.0 mm size 3.5 45.2 mm size 4 46.5 mm size 4.5 47.8 mm size 5 Select a ring you already own that perfectly. If a credit card is the same length as the line below, your guide is printed to the correct scale.