The size of the sheet is 117x171 mm or 4.6 x 6.7 inches. Each sticker is 35 mm or 1.4 inches wide. The height of each sticker is 29/33 mm or 1.1/1.3 inches, depending of the number of weeks in the month 5/6.
These stickers are handmade on thin matte sticker paper. Though not water proof, they can take a light layer of watercolour or similar. You can write on and stamp the stickers. Please allow for tiny imperfections and note that colours may vary from each screen.