To measure your furry friend correctly, start at the nape of their neck and finish at the base of their tail.
With your pooch standing up straight, feel for where their shoulder blades start (this is the nape of their neck). Measure from that point to where their tail joins their body (this is the base of their tail).
For an accurate measurement, your dog needs to be standing up straight with their head up. Sitting, laying down or holding them can result in an incorrect measurement.