This is the Sea Turtles Step-In Dog Harness - Size Large - 1 Inch Wide. This harness fits dogs' chest circumferences of 25 to 40 inches, utilizes a quick clasp closure (also called a side release clasp), and provides more control without a choking effect. Made right here in the USA from Yellow Dog Design. If you are shopping for designer, affordable dog accessories, then look no further. These durable, guaranteed to last dog products have no rough edges, no threads to fray or break, no problem going in the wash, and no stress getting them on or off your dogs. SIZING: Sizing is given as a range of chest widths. Measure your dog around the widest part of its chest, usually just behind the front legs.