Park Ridge Embossed Executive Envelope, #10, Commercial Flap, Gummed Closure, 4.13 X 9.5, White, 500/box Premium #10 business envelopes with subtle embossing and side seams are ideal for important mailings. Compatible with laser and inkjet printers so you can customize with addresses, designs and logos. Made of durable 24-lb paper. Just add moisture to the adhesive strip along the envelope flap and seal closed; no peel off strip to dispose of. These commercial envelopes are great for bulk mailings.