Medium dog wearing a raincoat standing with handler, showing proper posture for measuring back length and chest girth.

How to measure your dog for the right raincoat size

Start with two key measurements:

1. Back length
Measure from the base of the neck to the start of the tail.

2. Chest / girth
Measure around the deepest part of the chest (full circumference, wrapping over the spine).

What you need
• A soft measuring tape (or string + ruler).
• Measure while your dog is standing.

Measuring tips
• Keep the tape snug, not tight.
• For girth, measure at the deepest point of the chest.
• BellySwap’s adjustable hook-and-loop system is designed for a flexible, tailored fit across dog body types.
• Depending on breed and build, the fit may range from snug to relaxed.

Between sizes? Use chest/girth as the deciding measurement, and size up for an easier fit and more comfortable movement.