The Stanley 33-115 10-Foot Wrap-a-Round/Diameter Tape Measure is the perfect tool for measuring diameter. The 16-inch markings are ideal for determining the center of a circle or marking where to drill holes. It has 1/16" and 1/32" graduations after the first 12 inches, with each graduation thereafter being 1/16". This SAE tape measure has a blade length of 10 feet and a blade width of 1/4 inch. The housing is enclosed, made of ABS, and features a chrome blade color. When you need to take measurements on large objects, this Stanley 33-115 Diameter Tape Measure will get the job done right.