6 1/2 x 6 1/2 Square Contour Flap Envelopes - Midnight Black (50 Qty.) 6 1/2 x 6 1/2 Square Contour Flap Envelopes - Midnight Black (50 Qty.) Peel & Press Sealing Method Size: 6 1/2 x 6 1/2 (in.)