Versatile two-sided Hearts Calendar Cover-Ups feature beautiful and bold-colored heart designs with coordinating background colors on both sides. Each pack comes with 36 cards—33 numbered, two-sided cards, and 3 bonus blank cards—with coordinating designs on both sides. These 3" x 2.5" cards will fit any standard classroom calendar. These sturdy cards can also be used for sorting activities, game pieces, creating number lines, math lessons, and so much more! Many designs and colors to choose from to fit any classroom theme.