FurPick · brand sizing
Blue-9 harness sizing
Blue-9’s Balance Harness covers chest girths from 34cm to 110.5cm across 5 sizes. Does not start as small as most, so very small dogs need another brand. It also stops lower than most, so the largest dogs fall off the end of its range.
The full chart
| Size | Chest girth |
|---|---|
| XS | 34–45.5 cm |
| S | 44.5–64.5 cm |
| M | 53–81 cm |
| M/L | 61–90 cm |
| L | 73.5–110.5 cm |
Taken from Blue-9’s own chart, checked 2026-08-19.
What Blue-9 calls the same dog other brands would
Letter sizes do not travel between brands. A dog measuring 72cm around the chest takes Blue-9 M, and the same dog is:
If your dog measures between two sizes
Blue-9’s ranges overlap on purpose, so a measurement landing in two of them is normal rather than a mistake. What decides it is where inside each range you sit: near the bottom the straps run near their tightest, near the top there is little adjustment left and a growing dog will outgrow it. The size finder shows that position for every brand at once.