The Easy on Adjustable Dog Harness: Along with being adjustable in 3 locations, the Easy-On Dog Harness is built for comfort, quality and style. This step-in style harness is easy to put on your pet with quick closure and guaranteed control. Dimensions: X-Small - 3/8" x 10-16"Small - 5/8" x 12-20"Medium - 3/4" x 20-30"Large - 1" x 30-40" | Hamilton Products Inc. Easy On Adjustable Dog Harness in Black | Size Medium