Don't forget to turn your flash light on! Then the magic will happen.
 
Size Guide:
S:          Chest: 25-34cm Length(back): 26cm Neck: 28cm
M:         Chest: 34-40cm Length(back): 30cm Neck: 34cm
L:          Chest: 40-46cm Length(back): 35cm Neck: 38cm
XL:       Chest: 46-52cm Length(back): 42cm Neck: 42cm
XXL:    Chest: 52-64cm Length(back): 44cm Neck: 46cm
3XL:    Chest: 64-72cm Length(back): 52cm Neck: 52cm
4XL:    Chest: 72-82cm Length(back): 60cm Neck: 58cm
5XL:    Chest: 82-93cm Length(back): 76cm Neck: 63cm
 
**Please measure when your pet is standing up.
Length(back):
Measure from the base of neck (where the collar would fit) to the base of the tail (not the tip) along your dog’s backbone.
Neck:
Measure around your dog’s neck using a cloth measuring tape positioned where the collar sits.
If you don’t have a cloth tape measure, try using a piece of string and then measure the string with a ruler.
Chest:
Measure all the way around the biggest part of your dog’s ribcage, generally just behind the withers down and around just behind the front legs and back up the other side.