9 1/2 x 12 1/2 Catalog Envelope - Open end - 28# White (9.5 x 12.5) - Large Envelope Series (Pkg of 100) A Quantity of 100 - 9 1/2 x 12 1/2 Catalog Envelope - White 24# White Paper - Standard Gummed Flap. Great for catalogs, calendars, documents, contracts, certificates, advertisements or announcements. This envelope may be sourced from any one of a number of top brands. Ships via Priority Mail