Type: Pet Dog harness vest Season: Spring, Autumn, Winter Feature: Padded Material: Nylon, cotton Package: 1 X Dog Soft/Vest Harness Size Neck (cm/inch) Back Length(cm/inch) Chest(cm/inch) XS 18/ 7.09'' 20/7.87'' 25/ 9.84'' S 22/8.66'' 25/9.84'' 34/ 13.38'' M 28/11.02'' 33/ 12.99'' 42/ 16.53'' L 32/12.59'' 37/14.56'' 50/19.68'' NOTE: It is manual measurement, there may be 2-3cm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.hope understanding. Warm Note: -If any of the measurements are 'between' two sizes, choose the larger size. -If your pet is growing up, you can order a bigger size. -Take each measurement a bit loosely. Advices: 1. If you can't check your parcel, please contact us first, but do not open dispute. 2. If there is anything that you are not satisfied with, please do not hesitate to contact with us rather than leave a negative feedback. A negative or neutral feedback will not solve the problem, but we do.