One length. Two fits.
Choose the back length first, then select Regular or Wide fit.
Back Size Fit Neck Chest
8.7-9.5 in22-24 cm XS Regular 5.5-7.1 in14-18 cm 8.3-10.2 in21-26 cm
Wide 6.7-8.3 in17-21 cm 10.6-12.6 in27-32 cm
9.6-10.8 in25-27 cm S Regular 7.1-8.7 in18-22 cm 9.8-11.8 in25-30 cm
Wide 8.3-9.8 in21-25 cm 12.2-14.2 in31-36 cm
10.9-11.8 in28-30 cm M Regular 7.9-9.4 in20-24 cm 11.4-13.4 in29-34 cm
Wide 9.1-10.6 in23-27 cm 13.8-15.7 in35-40 cm

If your dog is between sizes, choose the size that best fits the chest.
Still unsure? Contact us

How to measure
BACK NECK CHEST
Back lengthFrom the base of the neck to the base of the tail - this sets the size.
Neck girthAround the base of the neck, where a collar sits.
Chest girthThe widest part, just behind the front legs.
Final checkMeasure snugly against the body and take it a couple of times for accuracy.