This is a package of 50pc pre-cleaned blank microscope slides and 100pc square cover slips. The dimensions of the slide are 1" x 3" (25.4x76.2mm) with ground edges. The cover slips are 7/8" x 7/8" (22x22mm) and 0.006" (0.15mm) in thickness. They are brand new in factory-sealed box. Features & Specifications: Quantity: 50 blank slides and 100 coverslips Dimensions of Slide: 1" x 3" (25.4x76.2mm) Dimensions of Cover Slips: 7/8x7/8x0.006" (22x22x0.15mm) Material: optical glass