Use this 9 x 12 Confidential First Class Envelope to mail any confidential documents. Large window accommodates a slip sheet with both mailing and return address. Envelopes have a self seal flap.Specifications:Style: LandscapeSize: 9" x 12"Top Window Size: 6 1/2" x 7"Top Window From Left Side: 2 3/4"Top Window From Bottom: 1"Weight: 28#Material: Brown KraftInk Color: GreenFlap Opening: LongSeal: Self Seal (Shipped Open)