Size:Small:Total length :7.8 inch/20 cm;Suitable for neck size:6.2-7 inch/16-18 cmMedium:Total length :10.2 inch/26 cm;Suitable for neck size:8.6-9.8 inch/22-25 cmLarge:Total length :12.5 inch/32 cm;Suitable for neck size:11-12.2 inch/28-31cmPlease measure and check the size certainly About Us: We will resolve any problem with you until you are satisfied. we sincerely hope that you can leave us a positive comment with 5-star for Seller Ratings.When you rate the shipping time part please take international transit into consideration. If, for any reason you are not satisfied with your purchase, please contact us directly instead of leaving neutral or negative feedback.We always be here for you. PLEASE DO NOT leaves us 1, 2, 3 or 4-star Detailed Seller Ratings because they are equal to negative feedback.We really appreciate for your great help and understanding.