Kartier Model Stud Ring •Since we use nickel-free metal, our products do not cause allergies. • Since it is produced from high quality metal, it does not deform easily and allows you to use it for a long time. •It does not darken unless it comes into contact with perfume, cream, disinfectant and similar chemicals. A wonderfully designed product that will add naturalness. An elegant ring that will beautify your special moments and complete your style, making you feel valuable at every moment of your life. Size Calculation: If you do not have a ring you are currently using, just take a piece of wire or a strip of paper. Wrap the paper strip around your finger and make a small mark with a pencil where the two ends meet. Then, measure the part of the paper up to the point you marked, in mm, with a ruler measuring millimeters. When you divide the measurement you found by the numbers 3-14, you find your number. For example, you measured your finger circumference as 60 mm, 60/3-14 = 19-1, your ring size is 19-1, complete the fractional numbers up, ring number 20 will be suitable for you.