Size Guide
Getting the size right is what makes a walk comfortable and safe. ARIA collars and harnesses come in sizes S, M and L.
How to measure your dog
Use a soft measuring tape, with your dog standing and relaxed.
- Neck — for the collar: wrap the tape around the base of the neck, where the collar sits.
- Chest — for the harness: measure the widest part of the chest, just behind the front legs.
Dog collar size chart
Match your dog’s neck measurement to the range for each size.
| Size | Neck (cm) | Neck (in) | Strap width (cm) |
|---|---|---|---|
| S | 28 – 38 | 11.0 – 15.0 | 2.0 |
| M | 34 – 50 | 13.4 – 19.7 | 2.0 |
| L | 42 – 62 | 16.5 – 24.4 | 2.5 |
Dog harness size chart
The harness adjusts at the neck and at the chest; use both measurements to choose.
| Size | Neck (cm) | Chest (cm) | Chest (in) | Strap width (cm) |
|---|---|---|---|---|
| S | 32 – 42 | 38 – 58 | 15.0 – 22.8 | 2.0 |
| M | 40 – 50 | 55 – 75 | 21.7 – 29.5 | 2.0 |
| L | 48 – 62 | 70 – 85 | 27.6 – 33.5 | 2.5 |
Leash and poop bag holder measurements
These are fixed-size pieces: they do not change with your dog’s size.
| Piece | Length (cm) | Width (cm) |
|---|---|---|
| Leash | 230 | 2.0 |
| Poop bag holder | 8 | 5 |
How the fit should feel
It should sit snug but never tight: you should be able to slide two fingers between the accessory and your dog’s body. For extra comfort, add roughly 1.5 cm to the neck and chest measurements before picking a size.
If your dog falls between two sizes, go for the larger one.
Still unsure about the size?
Send us your dog’s weight, breed and neck and chest measurements through our contact page and we will confirm the right size before you order.
If the size does not work out, exchanges are simple: you have 7 calendar days from delivery.