Keep it clean, people! This white eraser easily and smoothly removes what you want from paper or film No pressure! Just a gentle rub yields clean, no-smudge, no "ghosting" clean-up and minimal crumbling. And they won't get hard with age An essential part of school supplies for college, high school, and elementary students alike, where clean classwork and homework becomes critical Makes an excellent art eraser -- when you need wide areas of precise, clean removal to create white space or just need to correct a mistake Each eraser is 2.5" long x 0.9" wide x 0.5" high, and comes with a sliding sleeve for protection and handling