Quality Park No. 10 Business Envelopes - Business - #10 - 4 1/8" Width x 9 1/2" Length - 24 lb - Gummed - White - Wove - 500 / Box No. 10 Envelopes are essential for home and business use. These 24 lb. white wove envelopes are perfect for professional mailings and home projects. They feature a moisture-seal commercial flap. 4-1/8" x 9-1/2" envelopes are compatible with and inkjet printers to personalize your mailings. Side seams provide more surface area to print return addresses, logos and other graphics.