Black A2 Envelopes 4 3/8" x 5 3/4" - 100 Envelopes A2 Size Envelope (4 3/8" x 5 3/4") Black 24lb bond / 60lb text (90 gsm) Paper Stock Inkjet & Laser Compatible Square Flap - Gummed For Sealing 100 Envelopes Per Pack