Each package has a different combination of uniquely cut Mizushima memo paper, each with flashes of fluorescent color.  Back side of paper is blank.  Choose one of 3 sizes:

small: 2.5" x 3.6" (64x91mm) - 50 sheets (use for quick notes or to add to your planner)

medium: 3.6" x 5" (91×128mm) - 50 sheets (convenient memo size B7)

large: 7.3"x 10" (182 ×256mm) - 25 sheets (suitable size for letter writing.. or for small wrapping paper)