Firmly measure your dog's chest. Tightly measure your dog's chest at its widest point, about 3-5 cm from the armpit. Next, find the appropriate range in the chart. Choose the size that will give reserve for adjustment both ways. Pay attention to the width of the webbing. In sizes S and SSH, you can choose a webbing width of 20mm or 25mm, whichever is more comfortable for your dog.

If your dog's chest circumference is in the middle between the two sizes, go with the larger size. If none of the sizes shown fit your dog, or you're not entirely sure which size will fit your friend's dog, write me - I can help!