Corning offers economical packs of blank glass microscope slides for mounting your own specimens. These standard glass microscope slides are 1" x 3" with ground edges and 1 to 1.2mm thick. 70/box. These Corning microscope slides are made from water-white glass to maximize clarity and are frosted at one end on only one side. Corning glass microscope slides arrive, precleaned, in a box. Dimensions: 0.9 to 1.1mm thick.