Go by the chest, measured around the deepest part of the chest just behind the front legs. That's the measurement that decides the size. Length matters much less, and weight is only ever a rough guide.
The size finder on our size chart page does the matching for you: pick your hound's fit, pop in the chest and length and it will suggest a size. If the chest and length point to different sizes, go with the chest. Our guide to measuring your hound explains where to put the tape.
As a rule of thumb, a medium fits a greyhound of around 28 kg with a chest of 71 to 76 cm (28 to 30 in). Most female greyhounds take a medium.
If you're still not sure, email aroo@houndtees.com.au with the chest measurement and a side-on photo and we'll tell you which size to get.

New arrivals
Sale
New arrivals
Sale
New arrivals
Sale