Made of 24 lb. paper, these are a versatile and unique envelope option for all your mailing needs. Coming in an assortment of dark colors, they're great to use for a variety of occasions! RSVPs, thank you cards, invitations, greeting cards, announcements, photographs and more stay protected while their on the way to impress recipients. Use for both business and personal mailings or organization by color-coding! Each has a booklet opening, straight flap and smooth finish.Details:Includes an assortment of colors6" x 9.5" each24lb.125 envelopes