The Strathmore Full Sized Watercolor Cards are perfect for a number of creative announcements in watercolor, acrylic, or gouache. Whether it's an invitation, formal addresses, gift enclosures, personalized letters, thank you notes, or change of addresses; these envelopes are the perfect touch to any correspondence. The Strathmore Full Sized Watercolor Cards are made from 140 lb. cold press watercolor paper made with excellent surface strength and resists buckling. The full size matching envelopes measure 5.25"x7.25".