These envelopes are made out of smooth, high quality, 30% recycled paper. Each one features a straight flap and a reliable gum closure to keep items secure during their journey through the mail. The bright and amazingly vibrant color of these envelopes makes them impossible to miss! Use these envelopes to send invitations, greeting cards Thank You cards, letters, and more!Details:Available in multiple colors4.75" x 6.5" (A6) size24 lb. (90 gsm)50 envelopesRecycled paper