These square envelopes are made out of high quality paper. Each one has a flawlessly square shape. These envelopes are certain to get noticed by all mail recipients. Each one has a rectangular straight flap with a secure gum closure. The size of these envelopes makes them usable with standard sized invitations! Use them to send invites for bridal showers, birthday parties, graduation parties, baby showers, and more! Details:Available in multiple colors7.5" x 7.5"24 lb. (90 gsm)25 envelopesPaper