How to Measure a Bichon or Small Dog for Clothing
A fluffy coat, a compact body and a size label that changes from one brand to the next can make shopping for small-dog clothing feel surprisingly uncertain.
The most reliable place to begin is not with your dog’s weight or their usual “small” or “medium.” It is with three measurements: chest girth, back length and neck girth.
Once you have those numbers, compare them with the chart supplied for the individual sweater, raincoat or jacket you are considering. The same dog may wear different labelled sizes across different brands—or even across two differently shaped garments from the same brand.
Here is how to measure your little companion calmly and accurately.
What you will need
Keep the setup simple:
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A soft, flexible measuring tape
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A note on your phone or a piece of paper
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A calm place where your dog can stand naturally
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A few small rewards, if they help your dog stay comfortable
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A second person, if your dog prefers to wiggle through the process
If you do not have a soft measuring tape, use a non-stretch piece of string or ribbon. Mark where it meets, lay it flat and measure it with a ruler.
Avoid using a rigid construction tape directly against your dog. It will not follow the body comfortably and can make the measurement less accurate.
Before you start
Measure your dog while they are standing naturally on all four paws. Sitting, curling or stretching can change the shape of the chest and back.
Let the tape rest against the coat without pulling it tight or compressing the fur. For a Bichon, consider how their coat normally looks between grooming appointments. A very fluffy coat and a freshly groomed coat can create slightly different fits, especially in close-fitting sweaters.
Take every measurement twice. If the numbers differ, allow your dog to settle and try again.
1. Measure the chest girth
Chest girth is the distance around the widest part of your dog’s rib cage, usually immediately behind the front legs.
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Ask your dog to stand comfortably.
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Bring the tape underneath the chest, just behind the front legs.
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Wrap it around the fullest part of the rib cage.
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Keep the tape flat and comfortably close without squeezing.
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Record the complete circumference.
Chest girth is often the deciding measurement for dog clothing because a garment needs enough room to close around the body without restricting movement.
If the chest is too tight, the garment may rub behind the legs, pull across the shoulders or make normal movement uncomfortable. If it is much too loose, the clothing can shift, twist or allow cold air and rain underneath.
2. Measure the back length
Back length helps determine where a sweater, coat or raincoat will finish.
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Find the base of the neck, around the point where the collar normally rests and the neck meets the shoulders.
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Run the tape along the top of the spine.
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Stop at the base of the tail—not the end of the tail.
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Record the length while your dog remains in a neutral standing position.
Do not begin at the top of the head or measure down a curved side of the body. A straight, natural topline measurement gives you a more useful comparison with a product chart.
The ideal finished length can depend on the garment. A raincoat may be designed to cover more of the back, while a sweater may intentionally sit a little shorter.
3. Measure the neck girth
Neck girth is measured around the lower part of the neck where a collar or garment opening would normally sit.
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Place the tape around the base of the neck.
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Keep it level rather than allowing it to slide toward the head.
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Let the tape sit comfortably against the coat without tightening it.
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Record the circumference.
This measurement is particularly useful for sweaters that pull over the head and coats with a fixed or adjustable neck closure.
Which measurement matters most?
For many small-dog garments, chest girth is the first number to compare. It represents the widest part of the body and often determines whether the garment can close and move comfortably.
That does not mean you should ignore back or neck measurements. A size that fits the chest but is dramatically too long, too short or too narrow at the neck may still be the wrong shape for your dog.
Treat all three measurements as a set:
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Chest: Can the garment close and allow comfortable movement?
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Back: Will it provide the intended amount of coverage?
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Neck: Will the opening or closure sit comfortably?
Why a Bichon does not have one universal clothing size
Breed, weight and age can provide context, but they cannot replace measurements. Two Bichons of a similar weight may have different chest shapes, body lengths, coat volume or proportions.
Manufacturers also build garments differently. One brand’s small might overlap with another brand’s medium, while a stretchy sweater and a structured raincoat may use completely different fit logic.
For that reason, always use the size chart on the individual product page. For example, the GF Pet Reversible Elasto-Fit Raincoat lists garment-specific back and chest measurements and uses an expandable closure system. Those details are more useful than relying on the size name alone.
What if your dog falls between sizes?
There is no universal rule that every dog should automatically size up. Look at the garment’s design before deciding.
Consider:
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Whether the product is stretchy, structured or adjustable
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Whether the intended fit is close or relaxed
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Whether your dog has a particularly full coat
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Whether the chest or back measurement is closest to the edge of a size range
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Whether the product description includes brand-specific fit guidance
For a close-fitting sweater, stretch may provide some flexibility. For a structured coat, the chest closure and shoulder shape may matter more.
If the measurements point to two different sizes, contact us with your dog’s chest, back and neck measurements and the product name. We cannot replace the manufacturer’s chart, but we can help you review the product information before you order.
Check the fit when the clothing arrives
Let your dog try the garment indoors before heading out.
A comfortable piece should:
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Allow natural walking, sitting and lying down
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Sit without pulling tightly across the chest or shoulders
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Avoid rubbing behind the front legs
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Stay in position without twisting around the body
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Leave bathroom areas unobstructed
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Work safely with the leash or harness arrangement you plan to use
Watch your dog’s response. If they appear restricted, unusually warm, distressed or determined to remove the garment, take it off and reassess the fit.
Introduce unfamiliar clothing gradually. A short, calm fitting followed by praise or a small reward can be more comfortable than immediately expecting your dog to wear a new layer for an entire walk.
Save the measurements for next time
Keep your dog’s three measurements in your phone:
- Chest girth:
- Back length:
- Neck girth:
- Date measured:
- Coat length:
Remeasure periodically, particularly after a significant haircut, coat change, weight change or growth period.
Having the numbers ready makes it much easier to compare a sweater, parka or raincoat without starting from memory every time.
A quick small-dog clothing checklist
Before adding a garment to your cart:
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Measure the chest, back and neck.
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Open the individual product’s size chart.
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Compare all three measurements—not only weight.
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Review stretch, closures and fit notes.
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Consider your dog’s current coat length.
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Check the fit indoors before the first outing.
Ready to find their next layer? Explore sweaters, coats and rainwear selected for small dogs, then complete the outing with our Walk collection.
Frequently asked questions
What clothing size does a Bichon Frise usually wear?
There is no dependable universal size for every Bichon. Body proportions, coat volume and brand sizing vary. Measure your dog and use the chart supplied for the individual garment.
How tight should the measuring tape be?
The tape should lie flat and comfortably close without squeezing the body or compressing a fluffy coat. Your dog should remain relaxed and able to breathe normally.
Should I measure my dog while they are wearing a harness?
Measure the dog’s body directly unless the product instructions specifically say otherwise. If you plan to layer clothing over a harness, also review the garment’s design and available space for that arrangement.
Should I size up for a fluffy Bichon coat?
Not automatically. Consider the garment’s stretch, closures and intended fit, then compare your dog’s normal coat condition with the individual size chart. Contact Bichon Boutique if you would like help reviewing a specific product.
