Use this envelope with TaxWise, Drake, TRX Pro and TaxWorks software. Windows align with software-produced cover sheets. Constructed of 28# stock, this envelope measures 11 1/2" x 9 1/2" Style: Landscape Envelope Size: 9 1/2" x 11 1/2" Top Window Size: 2" x 4 1/2" Top Window From Left Side: 1 1/4" Top Window From Bottom: 6 7/16" Bottom Window Size: 2" x 4 1/2" Bottom Window From Left Side: 4 1/2" Bottom Window From Bottom: 1 7/8" Ships direct from the plant