1. Measure your pet from base of the neck to base of the tail. This is the length.

2. Measure your pet's chest at its widest point, which is usually behind the front legs, this the girth. Add about 2" to ensure costume fits.

3. Measure your pet at the neck around the top of the shoulders for neck measurement.

If your dog is stouter, has a thick coat, broader chest, wider underside or is at the maximum for the size chart you may want to go up to the next larger size for a looser fit. Please note the next size up will fit up to the largest size range listed.