These open end envelopes are made out of smooth, high quality, 28lb. brown kraft paper. They feature straight flaps and reliable peel and seal closures to keep mailed items secure in transport. They're great for cards, invitations, letters, folded documents, invoices, announcements, checks, bills, and more. Any type of pen or marker ink shows up on the brown surface of these envelopes. Easily mark them with names and addresses.Details: Brown kraft manila7.5" x 10.5"Available in multiple counts per packOpen end envelopesFeatures peel and seal closure,Made out of smooth, high quality, 28lb. brown kraft paperRecycled material