Square envelopes are definitely unique!  CutCardStock makes your DIY note card or invitation affordable with these Cougar natural 6 inch square envelopes that bring a soft, natural look to your project.  Available in a vellum finish that is smooth, but not slick, these off white envelopes have a beige undertone that is a perfect match for numerous colors.  

NOTE:  please check the USPS website for extra postage charges on square envelopes.