The 6 x 9 Catalog envelope has a width of 6 inches and a height of 9 inches, giving it a total surface area of 54 square inches. Its maximum enclosure size is 5.75 x 8.75 inches. This catalog envelope is sometimes referred to as the 6 x 9 booklet envelope, due to its sizing.
Catalog envelopes like the 6 x 9 get their dimensions from the width and height in inches rather than a numbering system. Catalog envelopes have an open end and center seam for flat insertion of documents without folding. The 6 x 9 catalog envelope provides a compact size for efficiently mailing smaller catalogs, brochures, booklets and other flat items. Its dimensions fall between the 6 and 9 inch height booklet envelopes. With its open end and protective enclosure, the 6 x 9 catalog is ideal for mailings that require flat insertion without wear and tear from folding.