#10 Right Side Window Envelopes (4 1/8 x 9 1/2) - 24lb. Bright White (500 Qty.) | Perfect for Checks, Invoices, Letterhead, Letters, Statements | 82624-500 #10 Right Side Window Envelopes / 4 1/8 in. x 9 1/2 in. / 4.125" x 9.5" / 105mm x 241mm Color - 24lb. Bright White Quantity: Pack of 500 USES: Checks, Invoices, Letterhead, Personal Letters, Statements, Bills, Flyers. Applications: Business Mailings, Direct Mail, Corporate Mailings, Financial Mailings, Personal Mail. Printable on off-set and digital printing presses and some home printers.