@Ravid Aloni -

If you are talking about doing this one time only, then copying and pasting a bunch of empty cells from a spreadsheet would do the trick. 

If it is to do it repeatedly, then you could use the Stickies template (see below) or just have folks use the Ctrl-D command to duplicate a sticky a number of times and then use the align feature to arrange them in a grid.

Kiron

Hey @Ravid Aloni,

There’s also a bulk mode for sticky notes:

And then you can align the stickies like this:

Hope this helps