HAOMMD34 Size-See Chart Below: Medium Features: -Dog harness. -Color: Pink camo. -Available in XXS, XS, Small and Medium sizes. -Made of breathable mesh, and a stretchy V neck for comfort. -Fully adjustable girth. -Includes reflective trim all around for added safety. Specifications: -XXS dimensions: 5" H x 1" W x 6" D. -XS dimensions: 7" H x 1" W x 7" D. -Small dimensions: 8" H x 1" W x 8" D. -Medium dimensions: 12" H x 1" W x 11" D. Reflective Mesh Sizing Chart Medium: -Chest Length: 22 - 26 inches / 55 - 66 cm. -Girth: 22 - 28 inches / 55 - 71 cm. Measure Dog to Find the Perfect Fit