Maximum insert dimensions: 7 5/8 x 11 1/4 inches. Overall product size: 7 7/8 x 11 1/2 inches. Standard opening drop measures 1/4 inch. Features a short-side opening suitable for vertical or portrait orientation. Constructed with 6 mil clear vinyl on the front and an adhesive rear. The peel-and-stick backing sticks securely to most smooth surfaces. As the manufacturer, we produce precise sizes with specific materials and options required.