This is a set of sticky notes in three different sizes. Thank you for looking. I used to work at PASONA and received these as a birthday present a few years ago. The sizes are as follows: [Top Left Pink] 4.5 cm (height) x 5.7 cm (width) [Top Right Yellow-green/Light Blue] 2.3 cm (height) x 5.7 cm (width) [Bottom Row Arrow 8 Colors] 4.4 cm (height) x 1.1 cm (width) (Height is measured at the longest point) I'm not sure how many sheets there are, but the height of the stack is about 2 cm. Thank you.