Step Easy 5500 Series - Classic Step-in Harness Size T3 Weight Up to 6 Lbs / Girth 12-14" ( Area behind front legs around the body) Classic Step-in Harness with new Velcro and D-ring Placement. D-rings moved to back straps Sizes adjust 1" bigger /smaller with addition of small snap clip on the side Cotton Print with Fleece Backing