Instructions:

1. Neck diameter: measure your dog's neck to fit it with a collar. Do not put it too tight or you might end up hurting your pet! Also, verify that it is not too large as it could slip off.

2. Chest (width): measure the width of your dog while facing it.

3. Chest (girth): Wrap a cloth measuring tape around your dog's chest, all the way round, directly behind the front legs and around the back, where its body is thickest. This is the most important measure as if the clothing is too large for your dog, it will trip over it and if it is too small, the clothing might not attach.

4. Torso Length: The distance from the base of the neck to the base of the tail.