The collars are measured from the tip of the buckle to the first and last holes to give the size range.
| Size | To Fit (guide only) | Width cm | Length Range cm |
| XXS | Chihuahua | 1.6 cm | 22.5 – 30 cm |
| XS | Jack Russell | 1.6 cm | 26.5 – 33 cm |
| S | Westie | 2 cm | 30.5 – 38 cm |
| M | Spaniel | 2.5 cm | 36 – 46 cm |
| L | Labrador | 2.5 cm | 43 – 53 cm |
| XL | Retriever | 2.5 cm | 51 – 61 cm |
| XXL | Great Dane | 2.5 cm | 58 – 68 cm |
