Quick answer: Dog clothes are sized by three measurements — back length (base of neck to base of tail), chest girth at the widest point, and neck circumference — never by breed alone. Measure with a soft tape while your dog stands, check the chart on the specific listing (each of our garments carries its own), and if your dog lands between sizes, always size up. A too-loose shirt is a minor style issue; a too-tight one restricts movement.
Returns on pet clothes almost always trace back to one mistake: ordering by instinct ("she's a small dog, so Small") instead of by tape measure. An XS in our jumpsuits is not an XS in our jerseys. Here's the three-measurement method, plus the real size charts from our best-selling garments.
The three measurements that matter
- Back length: from the base of the neck (where a collar sits) along the spine to the base of the tail, standing.
- Chest girth: around the widest part of the ribcage, just behind the front legs. This is the make-or-break number for most garments.
- Neck girth: around where the collar naturally sits — snug tape, two fingers of slack.
Use a soft sewing tape (or a string you then measure against a ruler), with your dog standing naturally. Don't pull tight, and don't measure a curled-up dog.
Real chart: Cozy Plush Dog Jumpsuits
Our plush autumn/winter jumpsuit ($19.99, 6 colors) publishes a full centimeter chart — here it is:
| Size | Back length | Chest | Neck |
|---|---|---|---|
| XS | 17 cm | 25 cm | 17 cm |
| S | 22 cm | 30 cm | 22 cm |
| M | 25 cm | 35 cm | 25 cm |
| L | 28 cm | 41 cm | 28 cm |
| XL | 34 cm | 47 cm | 34 cm |
| 2XL | 38 cm | 55 cm | 38 cm |
Match all three numbers, and when they disagree, follow the chest — a jumpsuit that closes around the ribs but runs a touch short in the back still fits; the reverse doesn't.
Real chart: Floral Dress & Lead Set (weight-based)
The cotton floral harness-dress ($19.99) sizes by chest and weight: S fits 30–35 cm chests on 0.5–2.5 kg dogs, M fits 35–40 cm on 2.5–5 kg, L fits 40–45 cm on 5–7.5 kg. Weight-banded charts like this are common on small-breed garments — if your dog's weight and chest point to different sizes, chest wins again.
The other size runs in our apparel line
- Stretch puppy shirts ($14.99): XXS–XXL in 9 colors. The listing's own advice: measure chest and front girth, and take the larger size when between — the stretch fabric forgives roomy, not tight.
- National team pet jerseys ($8.99): the widest run we carry, XXS–5XL across 8 designs — one of the few options that genuinely covers large breeds.
- A rule that repeats on every listing: between sizes → size up. Stretchy fabrics recover from loose; nothing fixes tight.
Fit-check after it arrives
- Two fingers slide comfortably under the garment at the neck and chest.
- Full leg motion — watch a short walk; no pinching at the armpits.
- The garment ends at the tail base, not over it, and doesn't cover the rear vent area.
- Your dog moves naturally within a few minutes. Freezing in place or refusing to walk usually means "too tight" before it means "doesn't like clothes."
Seasonal reality check
One honest note from our own listings: the plush jumpsuit is an autumn/winter garment that traps body heat but isn't windproof — best indoors and in mild conditions, not as a heavy-weather coat. The stretch shirts run year-round: sun and drafts cover in summer, base layer in winter. Match the garment to the season, not just the size.
Frequently asked questions
How do I measure my dog for clothes?
Three numbers with a soft tape while your dog stands: back length from collar-point to tail base, chest at the widest point behind the front legs, and neck where the collar sits. Compare against the chart on the specific listing - charts differ between garments.
What if my dog is between sizes?
Size up, always. Stretch fabrics handle a roomy fit fine, but a tight garment restricts movement and gets rejected by the dog. Chest measurement wins when numbers disagree.
Do you have clothes for large breeds?
The national team pet jerseys run XXS to 5XL - the widest range we carry. Most of our other apparel focuses on toy-to-medium sizes; check each listing's chart.
Are the jumpsuits warm enough for winter walks?
They're designed for autumn/winter and trap body heat well, but the fabric is not windproof - the listing itself recommends them for indoors and mild conditions rather than harsh weather.
Can I machine wash dog clothes?
The plush jumpsuits are machine washable and resist shrinking and fading per the listing. For other garments, check the care line on the product page before the first wash.
More from the Pup R Us blog
- The best-selling dog gear of 2026 — ranked by real orders
- No-pull dog harnesses compared — personalized vs mesh vs tactical
- How to use a dematting & deshedding brush the right way
- Shop all apparel
Size charts quoted are current as of publication — always confirm against the chart on the specific product page before ordering.