This was a great 'scrap busting' project! Typically these are referred to as 'post-it note holders' or 'sticky pad note holders'. At the moment I was out of 'sticky pads' so I decided to refer to these as just 'desktop easel note holders'. I had lots of paper off-cuts so I trimmed them to size to fit into the holders.
Here is an easy to follow video tutorial by Einat Kessler. She provides you with cutting dimensions, and demonstrates how to score, fold and glue to make this DIY Easel Note Box.
I made one box with the dimensions she provided and then adjusted the measurements and made two more slightly larger Note Boxes.
I have tons of notebooks, but I'm always reaching for a piece of scrap paper to just write a little note. These will be handy to have around my craft room!