Q Ray Q 153 Bracelet The Q 153 is the lightest Q Ray bracelet ever. Features Ultra Lightweight Band Durable Construction Comfortable Fit Contemporary Design 3 Colors For the Serious Competitor Sizing Our experience indicates that 75% of men wear a medium and 75% of women wear a small. Size is determined by measuring the circumference of your wrist, then select the corresponding size. If you have any questions about this product or would like to order by phone, please call us Toll Free at 888 733 8383. We look forward to hearing from you!