Pets First Inc. Sizing Charts
Pets First Inc. Pet Apparel
| SIZE | BACK LENGTH | CHEST GIRTH | WEIGHT |
| XS | 6"-9" | 10"-13" | Up to 8 lbs |
| S | 9"-12" | 13"-15" | Up to 15 lbs |
| M | 14"-18" | 15"-20" | Up to 25 lbs |
| L | 20"-24" | 20"-25" | Up to 40 lbs |
| XL | 22"-26" | 25"-31" | Up to 50 lbs |
Pets First Inc. Pet Apparel
| SIZE | BACK LENGTH | CHEST GIRTH | WEIGHT |
| XS | 6"-9" | 10"-13" | Up to 8 lbs |
| S | 9"-12" | 13"-15" | Up to 15 lbs |
| M | 14"-18" | 15"-20" | Up to 25 lbs |
| L | 20"-24" | 20"-25" | Up to 40 lbs |
| XL | 22"-26" | 25"-31" | Up to 50 lbs |