Choosing a Dog Coat: Size, Fit and Weather Guide

By Ferplast U.K. | Published: 2026-10-15

Category: أدلة الشراء

Learn how to choose a dog coat with a simple size and fit check, plus when a waterproof rain coat or warm winter coat actually helps on walks.

Quick answer

Choose a dog coat by measuring the two points that decide comfort: the base of the neck to the base of the tail for length, and the widest part of the chest for girth. Pick a waterproof rain coat for wet, windy walks and a warm coat for winter only if your dog has a thin coat, is small, old or short-legged. Fit matters more than fabric: the coat should cover the back without rubbing the tail or catching the legs.

Measure before you shop

Stand your dog on a flat floor and use a soft tape measure. Measure from the base of the neck (where the collar sits) to the base of the tail, then around the widest part of the chest just behind the front legs. Write both numbers down and compare them with the size chart before ordering. If your dog is between two sizes, size up for chest room and check that the back length is not so long that it covers the tail.

Neck-to-tail length: decides back coverage.
Chest girth: decides whether the coat closes without pinching.
Leg position: check that the front legs move freely.

Match the coat to the weather, not the season

A waterproof dog rain coat earns its place on wet, muddy walks because it keeps the back and chest dry without adding bulk. A warm dog coat for winter is different: it traps heat, so it helps short-coated, small, senior or very lean dogs on cold, still days. For cold weather walks in wind and rain, a waterproof outer with a light lining usually works better than a thick coat that soaks through. If your dog overheats easily or has a thick double coat, a rain shell alone is often enough.

Fit checks that stop rubbing and slipping

Put the coat on and fasten it as you would on a walk. Slide two fingers under every strap and the chest panel; if you cannot, it is too tight. Watch your dog walk, turn and sit. The coat should stay centred, not slide to one side, and the leg openings should not catch the elbows. A coat that flaps or twists will rub, so adjust the straps or try a different shape rather than forcing the fit.

Check the neck opening: it should not press on the throat.
Check the tail area: the rear edge should sit clear of the tail.
Check after five minutes of walking, not just standing.

Small dogs and short-legged dogs need different shapes

Best dog coat for small dogs often means a shorter back length and a deeper chest panel, because a coat cut for a large breed will hang past the tail and drag. Short-legged dogs such as dachshunds need a long back with a shallow chest, while deep-chested dogs need more girth and a shorter back. If the size chart only gives one measurement, treat the chest girth as the deciding number and accept that the back length may need adjusting.

Decision rules for buying a dog coat

If it is raining or the ground is wet: Choose a waterproof dog rain coat with a simple belly strap and no thick lining. Dry back, no heavy bulk.
If it is cold, dry and still: Choose a warm dog coat for winter with a lined body, but only if your dog is small, short-coated, lean or senior. Warmth helps only when your dog actually needs it.
If your dog is between sizes: Size up for chest girth and check that the back length still clears the tail; adjust straps rather than accepting a tight chest. Chest room first, length second.
If the coat twists or rubs: Re-check the neck opening, chest panel and leg openings after a five-minute walk; if it still moves, change the shape rather than the size. A moving coat is the wrong cut, not the wrong size.

Ferplast products that support the routine

100% SNACK FILLABLE - TOOTHBRUSH ASCOPHILLUM: 100% Snack by Ferplast is a range of vegetarian dental snacks for dogs that work mechanically during chewing to help remove plaque. A dental snack after a wet or muddy walk gives your dog a reason to settle while you clean and dry the coat.
SUPERNOVA: Supernova is a stainless steel feeding bowl with a raised rim designed to prevent insects from entering the bowl. A raised-rim bowl keeps water and food cleaner outdoors, which matters if your dog wears a coat on garden or patio breaks.
DOG FENCE modular dog playpen: DOG FENCE is a modular dog playpen made of powder-coated metal, available in a 4-panel 90 cm height, a 6-panel 60 cm height and an 8-panel 60 cm height version. A playpen gives you a safe place to let a coated dog dry off or cool down without tracking mud through the house.

Who this dog coat advice fits

Best for

Owners of small, short-coated, senior or lean dogs that feel the cold on winter walks
Owners who walk in wet weather and want a waterproof layer without a heavy lining
Owners who need a repeatable measuring routine before ordering online

Not for

Dogs with a thick double coat that overheat easily in any added layer
Owners looking for a coat to leave on indoors all day
Dogs that panic or freeze in clothing; build confidence with short, rewarded sessions first