Measuring for your dog for a harness:
- Ensure your dog is standing still
- Measure using a fabric tape measure or string
- Measure the chest immediately behind the forelegs and immediately in front. Both sizes should fit within the adjustable range.
| To Fit Dogs with Chest Size | Dogs up to | Harness Strength | |
| XS | 31-37 cm / 12.5-15in | 5kg | 70kg |
| S | 38-56 cm / 15-22.5in | 17kg | 119kg |
| M | 54-65 cm / 21.5-26in | 32kg | 224kg |
| L | 64-78 cm / 25.5-31in | 41kg | 287kg |
Note: If your dog's head, neck, and body are all approximately the same size (i.e. as with Pugs and similar breeds), a step-in harnesses is not suitable for your dog.