This adjustable ring sizer measures US finger sizes 1 to 17, providing accurate and clear readings for jewelry sizing. The sizer is equipped with a built-in magnifier, making it easy to read and accurately determine finger size. Simple to use by sliding the sizer onto the finger and adjusting to a comfortable fit, then reading the inner diameter for accurate measurement. Made from durable, high-quality material, this reusable tool is reliable for measuring rings and other jewelry items for hobbyists, jewelers, and professionals. This adjustable ring sizer measures US finger sizes 1 to 17, offering precise and clear readings for jewelry sizing. It features a built-in magnifier for easy and accurate measurement of finger size. To use, slide the sizer onto the finger, adjust for a comfortable fit, and read the inner diameter. Made from durable, high-quality materials, this reusable tool is reliable for measuring rings and other jewelry items, making it ideal for hobbyists, jewelers, and professionals.