Looking for the Medium Female size?  That's our Medium/Large Unisex that accommodates most medium-sized female dogs in addition to male dogs.  The 5.5 inch pad width is between the Large Female (7.5 inches) and Small Female (4 inches) sizes.  

For tall lean dogs, consider our Tall Female size.

For barrel chested dogs with a narrow waist, like Boxers, consider our Small Female size.