| NFL Dog Harness Vest, Soft Breathable Mesh, Reflective Safety Stripe and Edge, High Quality Quick Release Buckle, Fully Adjustable Chest Sizing Strap.
| Size | Neck | Chest |
| Small | 10.5" | 13 - 19" |
| Medium | 12.5" | 14 - 20" |
| Large | 14" | 16 - 24" |
| X-Large | 16.5" | 20 - 29" |
| 2X-Large | 19.5" | 24 - 35.5" |
| 3X-Large | 21" | 32 - 44.5" |
Below is how you measure your dog. 
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