FurSize / Brand size charts / Blue-9 size chart
Blue-9 Balance Harness size chart
Blue-9 publishes its Balance Harness chart as an image on the product page, with inches and metric side by side. It sizes by the ribcage, and it asks you to measure in a slightly different spot than most brands.
FIND YOUR SIZE
Type your dog's chest number
Slide or type to see which row fits.
| Size | Chest girth | Strap width |
|---|---|---|
| XS | 13.5–18 in (34–45.5 cm) | 5/8 in (1.5 cm) |
| S | 17.5–25.5 in (44.5–64.5 cm) | 5/8 in (1.5 cm) |
| M | 21–32 in (53–81 cm) | 3/4 in (1.9 cm) |
| M/L | 24–35.5 in (61–90 cm) | 1 in (2.5 cm) |
| L | 29–43.5 in (73.5–110.5 cm) | 1 in (2.5 cm) |
Numbers copied from blue-9.com, checked 2026-10-10. Brands change charts, so confirm on the product page before you order. FurSize is not affiliated with Blue-9.
Before you order
Blue-9 says to measure around the ribcage about 2 inches behind your dog's elbow, which is a little further back than the widest point most brands use. Sizing is also noted as subject to change.
Different brands cut different sizes, so a Medium here is not a Medium elsewhere. Match the chest number every time. The fit check takes a minute once it arrives.
Other brand charts
- Ruffwear Front Range size chart
- Kurgo Tru-Fit size chart
- PetSafe Easy Walk size chart
- Julius-K9 IDC Powerharness size chart
- Rabbitgoo size chart
- Wild One Cushioned size chart
- Mighty Paw Sport size chart
- Non-stop Line Harness size chart
- Lupine Eco Step-In size chart
- PetSmart harness chart size chart
- Sporn Easy Fit size chart
- Embark Adventure size chart
- 2 Hounds Freedom size chart
Questions
What size Blue-9 balance harness should I get?
Match your dog's chest girth to the chart on this page. Blue-9's ranges overlap, with five sizes from XS to L. Its chart does not give an in-between rule, so use the strap width as a second clue: the wider straps suit bigger dogs.
Where exactly does Blue-9 want the tape?
Around the ribcage, about 2 inches behind the elbow. For most dogs that is close to the widest part of the chest, but if your dog is deep-chested, measure both spots and use the larger.
How do I measure chest girth?
Stand your dog and wrap a soft tape around the widest part of the ribcage, just behind the front legs. Keep it snug, with room for two fingers.
Get a number you can reuse.
Type your dog's chest once. See the right size in every brand we cover.
