Martin-Simplex Lip & Cheek Retractor is a curved instrument specifically designed for oral procedures, especially in plastic surgery. 4 1/2" (11 cm) with a fenestrated handle and a narrow neck. It has a concave blade with opens the mouth on one side when placed at the angle of the mouth. https://new-medinstruments.com/cheek-and-lip-retractors-transparent-package-of-2-autoclavable.html