Its super easy to measure your dog for their Oh So Fetch Harness or Collar. Simly measure their neck and chest to find the most suitable fit.

SOFT HARNESS 

XXS Neck: 24-32CM Chest: 28-38CM

XS Neck: 29-36CM Chest: 36-48CM

S Neck: 35-44CM Chest:41-54CM

M Neck: 39-51CM Chest: 46-61CM

L Neck: 42-56CM Chest: 57-83CM

H STRAP HARNESS 

Neck 50-78cm Chest:64-100cm