A convenient all-purpose mailing envelope. Security tint keeps contents private. Secure Grip-Seal flap simply peel off release strip and press down for a quick, secure seal. Envelope Size: 9 x 12 Envelope/Mailer Type: Catalog/Clasp Closure: Grip-Seal.QUACO926. CO926. Columbian Columbian Grip-Seal Security Tinted Catalog Envelopes.