Strathmore-Cards & Envelopes: Stamping. The distinctive texture and quality of Strathmore creative cards are the perfect way to personalize your correspondence! Ideal for colored pencils, rubber stamps, die cuts, collage and more! Create unique, hand decorated cards for special occasions or everyday use. This package contains twenty 5x7 inch blank cards in a smooth white texture and twenty envelopes. Acid free. Made in USA.