This is Robert Kaufman's Prisma Dyes Artisan Batiks: Lunn Studios Rollups or Jelly Roll aptly named Stormy Skies, RU-1219-40 and includes its wonderful selection of batik black and gray pre-cut strips. This collection is a wonderful addition to your fabrics and includes 40 pre-cut 2.5" strips for a total of 2.8 yards. You will be very pleased with this selection. At 2-1/2" x the width of fabric, these are very functional! Un-roll for binding, sashing, inner borders, strippy quilts, strip piecing, fabric hooking, and much more!