For a bespoke harness, measure the head at its widest point by making a loop with the tape that easily slips on and off. This is crucial for deep-chested breeds like Dachshunds, Staffies, or Pugs.

Wrap the tape around the fullest part of your dog's body, just behind the front legs. Allow for two fingers of space for comfort. If your dog is near the upper end of a size range, consider sizing up, especially for certain breeds.

Starting at the base of the neck, run the tape straight down along the centre of the chest to the lowest point of the breastbone. This is especially useful for breeds prone to a deep chest, like Dachshunds, Staffies, and Pugs, where a standard chest/girth measurement alone may not give a snug fit.