This CD mailer is easy to assemble-snaps together,locking tabs seal box securely with peal and stick adhesive. 200 lb. Test white corrugated fiberboard. Stores one CD or DVD in a standard jewel case. Can also be used for CDs in sleeves. Comes packaged in 100 Per box. CD Mailers Dimensions 5 7/8" x 5" x 5/8ths"