For most accurate fit, put your dog’s paw on a piece of paper. Measure the back of the rear paw pad and the tip of the longest claw.
XXS: for paws up to 1.5" long, 1.5" width (approx. 5-12 lbs)
XS: for paws up to 2" long, 1.75" width (approx. 12-25 lbs)
S: for paws up to 2.5" long, 2" width (approx. 25-32 lbs)
M: for paws up to 3" long, 2.25" width (approx. 32-47 lbs)
L: for paws up to 3.5" long, 2.5" width (approx. 47-65 lbs)
XL: for paws up to 4" long, 2.75" (approx. 65-90 lbs)
XXL: for paws up to 4.25" long, 3" (approx. 80 + lbs)
Keep in mind, it can take dogs a while to adjust to wearing booties. When you first put them on, you may notice the “high step,” as the boots can throw off your dog’s coordination because he no longer can feel the ground surface. It may take a bit of adjustment – both inside and outside.