Quality Park No. 10 Window Security Envelopes - Single Window- 4 1by8 W x 9 1by2 L- 24 lb - Gummed - Wove - White Description: No. 10 envelopes feature blue ink inside tint for increased privacy and a window to show the mailing address. The 1-1/8 x 4-1/2 window is positioned 7/8 from left and 1/2 from the bottom. 24 lb. security envelope also features white wove construction a contemporary seam and gummed flap. Features: Product Dimensions: 4 1/8 W x 9 1/2 L Weight: 24 lb Gummed. Wove Color: White Country of origin: Mexico Brand Name: Quality Park Model No: 2088-QUA21412