75 mm square is just right. About six lines can be written even in transmission as sentences. 【From ** sama - sometimes ... There is a message. TEL ###] can write with scratch even with scribbles. I can write about 50 * 75 mm sticky notes, but the difference is that the glue part is also wide. Compared to 50 * 75 mm, since the adhesive area is 1.5 times, it is safe to use. Even if it sticks to a PC monitor etc, it will not get dirty, and it will not peel off freely. Because this large capacity type is contained in a box, it is easy to store too much. Recommended.