Customizable #10 Business Envelopes w/Return Address (4 1/8 x 9 1/2) LUX Paper - Ivory (50 Qty.) 50 Pack of Custom Return Address Envelopes - #10 Ivory Business Envelopes Paper Weight: 60lb. Text Weight Envelope Sealing Method: Mostinable Glue - Home Printer Compatability: Laser & Inkjet Friendly Return Address can be printed with up to 6 lines of text, on the top left corner. Item produced and printed in the USA - Standard Production Time: 2 Business Days