These double-window envelopes come preprinted with the statement Important Tax Return Document Enclosed. The envelope is compatible with the 4 up condensed, W-2 tax form. Features security tint and cellophane windows to ensure the privacy of information. Size: 5 3/4 x 8 3/4. Top Window Size: 9/16 x 3 7/8. Top Window From Left Side: 5/16. Top Window From Bottom: 3 9/16. Bottom Window Size: 11/16 x 3 7/8. Bottom Window From Left Side: 4 3/8. Bottom Window From Bottom: 2 1/2. Weight: 24 pound paper. Material: White. Ink Color: Black. Flap Opening: Long Extended Self Seal. Quantity Discount built into pricing. Item Number 92580 (replacement item TF99992, 4UPDWENVS05, DW4SS).