Rolled Dog Collar Puppy Leather Soft Padded Round XS S M L XL Sizes (Pink, 18-21.5 inches.Reference 3507/0250) Size XXXS - ref # 2226/2230. Width - 3/8". Length - 9 . This collars will fit 7"- 8 1/5 dog's neck. *** Size XXS - ref # 2240/2231. Width - 3/8". Length - 11". This collars will fit 8"- 10" dog's neck. Size XS - ref # 2241/2232. Width - 3/8". Length - 14". This collars will fit 10"-13" dog's neck. Size S - ref # 3505/0039. Width - ". Length - 17 1/2". This collars will fit 13"-16" dog's neck. Size M - ref # 3506/0158. Width - 5/8". Length - 20". This collars will fit 16"-19" dog's neck. Size L - ref # 3507/0250. Width - ". Length - 23". This collars will fit 18"-21  dog's neck. *** Size XL - ref # 3531/0269. Width - ". Length - 26". This collars will fit 21"-25" dog's neck.