Muzzle styles and sizes
The table contains a list of the different styles and sizes, starting with the smallest in ascending order of depth. Please follow the instructions on how to measure your dog found here and once you have the length of head and the circumference needed for panting identify the muzzles below that are the nearest match for length and depth to identify which sizes and styles will fit.
For the length choose the same as the measurement you took, or shorter as the muzzles have a headstrap to get the perfect fit. The difference in overlength of the 107 and 110 is negligible and shouldn't influence your choice between the two styles.
As a final check hold a loop of tape that measures the same as the circumference of the muzzle you have chosen over the end of the dog's nose, If you are doubtful they can fully pant then look at the next size up.
Oscar will have enough panting room in the muzzle his owner is looking to buy. Storm's owners looked at 28cm and didn't think there was enough panting room, so looked at 31cm and found this was deep enough.