The 10 x 13 Catalog envelope has a width of 10 inches and a height of 13 inches, giving it a total surface area of 130 square inches. Its maximum enclosure size is 9.75 x 12.75 inches. This oversized catalog envelope is sometimes referred to as the 10 x 13 booklet envelope.
Catalog envelopes like the 10 x 13 get their sizing from the width and height in inches rather than a numbering system. With its open end and center seam, the 10 x 13 provides substantial space for large flat mailings. It offers expansive width and extended height for enveloping big catalogs, posters, documents and other oversized products requiring protected, flat mailing without folding. As one of the largest catalog sizes, the 10 x 13 serves an important niche for enveloping particularly big flat pieces up to 12.75 inches tall. Its huge dimensions make it ideal for safely sending large, unwieldy mailings.