Use this double window envelope for convenience when mailing checks. To confirm compatibility with your checks, order a free sample or call our customer service team.Specifications: Size: 3 7/8" x 9 1/4"Top Window Size: 7/8" x 3 1/2"Top Window From Left Side: 3/8"Top Window From Bottom: 2 7/16"Bottom Window Size: 1" x 3 1/2"Bottom Window From Left Side: 7/8"Bottom Window From Bottom: 11/16"Weight: 24#Material: White WoveFlap Opening: LongSeal: Moisture