Produced from high-quality 24 lb. paper, these envelopes are elegant, sturdy and durable. Party invitations, announcements, letters, flyers and other personal and business materials will look at home in these envelopes. Each features a booklet opening and straight flap with gum closure. Partially made from recycled materials so they're environmentally friendly.Details:Available in multiple colors4.125" x 9.5" each500 envelopes24lb.Standard #10 size