Measure the width of your palm , and to find the correct size bracelet related The size of your palm width = relative sizes of your bracelet ( Please measure the widest part of your palm ) The width of your palm size 62 mm - 66 mm = diameter 50MM-52MM bracelet Your palm width 66 mm - 70 mm = 52 mm diameter bracelet relative sizes - 54 Your palm width 70MM - 74mm= diameter 54 mm bracelet - 56 mm The width of your palm size 74 mm - 78 mm = 56 mm diameter bracelet - 58 mm Your palm width 78 mm - 82 mm = 58 mm diameter bracelet relative sizes - 60 mm The width of your palm size 82 mm - 86 mm related to the size of the bracelet 60 mm diameter - 62 The width of your palm size 86 mm - 90 = bracelet of 64 mm diameter, 62 mm Your palm width 90 mm - 94 mm = 64 mm in diameter of bracelet - 66 mm Your palm width 94 mm - 100 mm = 66 mm in diameter of bracelet - 68 mm Custom Size Diameter 55 mm -66 mm Please select your size: ( type the seller " one at checkout size you select " Message ) - Shape / Type: Bracelets - Material / black jade gemstone :/ - Level / Model : 100 / Type A / A grade - Country of Origin: China - Refractive index: 1.66 - 1.67 - Specific gravity: 3.33 - 3.34 - Colors and varieties: black , cold varieties - Size : Custom Size Diameter 55 mm -66 mm - Weight ( g / CT): 18.8 g / 94 kt - Luster: vitreous luster - Surface texture : medium grain Standard international shipping 10-18 days to send to you Yes, we offer a tracking number , so you can keep track of all the information . Registered mail All our packages with online tracking number will be shipped by registered mail Thank you for reading , if you have any questions, please contact me.