Size: 5 # (width 2.52 inch) 4 Pack Dog Shoes This set of anti-slip boots will be their good partner, providing traction and paw protection in everyday environments. Rottweiler and all common dogs. How to measure: & Eacute; step 1. Place your dog’s paw on the paper. & Eacute; step 2. Mark the length and width of the legs , including toes and fingernails. Use the longest and widest size for the perfect fit. Note: For accurate data, 4 dogs’ paws must be measured. Size inside ; top (inch) 1 #: width 1.57 inch / 4 cm 2 #: width 1.77 inch / 4.5 cm 3 #: width 1.97 inch / 5 cm 4 #: width 2.25 inch / 5 , 7 cm 5 #: width 2.52 inch / 6.4 cm 6 #: width 2.76 inch / 7 cm Memory allocation error: 0.11-0.20 inch. < br /> Package includes: a pack of 4 dog boots