Please must measure your pet's neck/chest size and weight before payment,Your baby usually wears size S, but it doesn't mean all size S will fit him/her. If any of the measurements are between two sizes, choose the larger size. Color: Red Material: Grasp the flannelette Target Species: Cats, Dogs Size Chart Boy Size----bust-----------Dorsal length------------Neck circumference XS----36cm | 14.1''----23cm | 9.0''----26cm | 10.2'' S----40cm | 15.7''----30cm | 11.8''----28cm | 11.0'' M----44cm | 17.3''----36cm | 14.1''----34cm | 13.4'' L---46cm | 18.1''----40cm | 15.7''----32cm | 12.6'' Girl Size----bust------Dorsal length------------Neck circumference XS------37cm | 14.5''------26cm | 10.2''-----------------------26cm | 10.2'' S------40cm | 15.7''------30cm | 11.8''-----------------------28cm | 11.0'' M------42cm | 16.5''------31cm | 12.2''-----------------------32cm | 12.6'' L-----48cm | 18.9''------38cm | 14.9''-----------------------36cm | 14.1'' How to measure pet's size: 1.Measure length of Pet's back form the base of the neck to the base of the tail (Length). 2.Measure neck circumference if necessary. 3.Measure the broadest part of the chest (Girth) all the way around (usually just behind the front legs). Package included: 1*Pet Santa Claus Outfit Christmas Hoodie: Comes with Santa cap and matching waist band,your pet will look like an adorable Santa Claus, get your pet involved in the entertainment you have at the festival. Material: Made of Grasp the flannelette, soft and breathable wearing feeling, keep your dog feel comfortable and warm all the day, simply wash with warm water and mild soap then air dry Easy To Wear: With button closure design, easy to put on and take off. Many sizes optional, please choose the suitable one according your pet's size and weight Suitable for winter cold weather，keeps your pet warm and cozy throughout any outdoor activity. great idea for any festival like Christmas, weekend cosplay parties or daliy wear.