Ring Size 8: Inner Diameter:18.1mm Circumference: 57mm<br />Ring Size 9: Inner Diameter:18.9mm Circumference: 59.5mm<br />Ring Size 10: Inner Diameter:19.7mm Circumference: 62mm<br />Ring Size 11: Inner Diameter:21.4mm Circumference: 64.5mm<br /><br />Specifications<br />Jewelry Type Statement Rings<br />Occasion Sports， Casual， Daily， Party， Wedding<br />Material Acrylic， Stainless Steel<br />Shown Ring Size 14.13.12，11， 10，9，8.7<br />Net Weight (Kg) 0.015<br /><br /><br />The Ring Size is American Size.10 and 11suitable for man's finger <br /><br />We usually ship our jewelry by Hong Kong Post Mail， It is cheap and It takes average 20~28 days to deliver to your country. Thank you for your patience. If you are satisfied with our products， Pls Click &quot;Five Star&quot; and feel free to shop again. Thank you.<br /><br />Unless quality problem， we do not take responsibility of shipping fee backwards