#10 Right Hand Window Envelope - 24# White (4 1/8 x 9 1/2) - Window Envelope Series (Box of 1000) A Quantity of 1000 - #10 Right Hand Window Envelope - White 24# White Wove Paper - Window: 1 1/8 x 4 1/2. 4 1/8 from Left. 1/2 from bottom. Great for mailing checks, letters, invoices, statements, brochures, contracts, newsletters, business correspondence, and more. This envelope may be sourced from any one of a number of top brands. Ships via UPS Ground