How to measure your dog for a raincoat and check the fit
Measure your dog, compare the specific coat’s size chart and check movement, harness access and comfort before the first rainy walk.
A size labelled “medium dog” says little about how a raincoat will fit. Two dogs of the same weight can have different back lengths and chest measurements. Before buying autumn clothing, measure the dog and examine the particular design instead of guessing from breed alone.
First decide what the garment should do: cover the back from rain or protect more of the body from mud. Rainy weather does not mean every dog needs identical clothing. This guide concerns fit once you have decided to try a raincoat.
Set up a calm measuring session
Use a flexible tape measure. Alternatively, mark a length on non-stretch string and measure it with a ruler. Ask a helper to stay beside the dog on a non-slip surface. Do not restrain the dog forcibly to obtain a perfect number.
Let the dog stand naturally. Pass the tape around the widest part of the rib cage without compressing the body and coat. Ruffwear uses chest girth to size its apparel and other equipment. This illustrates one manufacturer’s approach; it is not a universal chart for every brand.
Record measurements before choosing a size
A particular coat may also need back length and neck circumference. Find the start and end points on that model’s diagram. Do not borrow a measuring method from another website when the points differ. Repeat the measurement to catch a twisted or misplaced tape.
Write down the date, measurements in centimetres and model name. “M” without a brand and model tells you little. If measurements fall between sizes, follow that design’s guidance or ask the seller. Automatically sizing up does not always produce a useful fit.
Check how it works with the harness
Decide whether the harness will sit underneath or over the coat. Check that any opening lines up with the lead attachment without pulling the fabric. Clothing does not replace dependable walking equipment.
Consider how the garment goes on. A design pulled over the head differs from one with opening fastenings. If the process bothers the dog, pause and look for a more comfortable option. Tightening straps to stop the dog moving is not a fitting solution.
Try it indoors before the rain
Let the dog walk, turn, sit and lower their head. Inspect behind the front legs, around the neck, along the belly and at the back edge. Fabric should not visibly tighten during normal movement, and parts should not obstruct toileting.
Repeated freezing, attempts to remove the garment or an altered gait are reasons to stop and review the fit. Do not automatically label them an adjustment period. Keep packaging and labels while checking the seller’s fitting and return conditions.
After a first short walk, see whether the coat stayed in position and is easy to remove. Dry and clean it according to its instructions. A suitable size is confirmed by the individual dog moving calmly and freely, not merely by a measurement matching a chart.
Sources
Sources checked on 25 October 2026.