For best fit measure the girth of the dog. This is the area behind the front legs and around the body. The neck will typically fall into place once girth is determined. If the measurement is close to the end of the size range, go up to the larger size.
Size Weight Neck Girth Price
XS 3-5kg 28-46cm 30-48cm £18.00
Small 5-10kg 35-56cm 38-61cm £19.15
Med 10-19kg 40-68cm 46-74cm £20.30
Large 19-35kg 46-79cm 46-84cm £21.45
XL 35kg+ 53-91cm 56-97cm £23.99