How to measure the dog size?
Chest: measure the thickest part of the chest, add 2~3CM will be better. (Usually behind the two legs)
Length: Make sure your dog stands properly, not sitting or lying. Measure along the dog's backbone from the base of the neck to 5CM front the base of the tail.
Neck: the girth of the neck, add 2~3CM will be better.

Note: If your dog is a large chest, long hair, or at the high end of the size, you may order the next larger size to ensure a comfortable fit. If you not sure the size, pls feel free to contact us.

Size Details:

Size S: Neck: 23cm/9.0inch, Back: 20cm/8.0inch, Chest: 32cm/12.5inch; for weight 3-4 pounds/1.5-2.0 KG.

Size M: Neck: 26cm/10inch, Back: 25cm/9.5inch, Chest: 37cm/14.5inch; for weight 4-5 pounds/2.0-2.3 KG.

Size L: Neck: 29cm/11.5inch, Back: 30cm/11.5inch, Chest: 42cm/16.5inch; for weight 6-10 pounds/2.7-4.5 KG.

Size XL: Neck: 32cm/12.5inch, Back: 35cm/13.5inch, Chest: 47cm/18.5inch; for weight 11-15 pounds/5-6.8 KG.

Size XXL: Neck: 35cm/13.5inch, Back: 40cm/15.5inch, Chest: 52cm/20.5inch; for weight 16-20 pounds/7.3-9.1 KG.

Breed recommend: (for reference only):

Teddy or Poodle Adult dogs: sometime take M, L, XL
Chihuahua Adult dogs: sometime take XS, S or M
Pomeranian Adult dogs: sometime take S or M
Miniature Schnauzers Adult dogs: sometime take L or XL

The recommend weight is just for reference, please kindly take a measurement of your dog before buy,thanks.