Pro Art-Strathmore Foldover Notecards. Strathmore Writing paper delivers the ultimate handwriting experience. Preforms beautifully with a broad range of writing instruments including fountain pens. This package contains twenty 6-1/4x4-1/2 inch notecards and twenty 6-1/2x4-3/4 inch envelopes. 24 pound and acid free. 25% cotton. Made in USA.