Box Notizzettel, Box for Memo block 9 * 9 cm

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/lietLuF4sQJ

I made this box for a memo block with size 9*9 cm (width, length). The bottom walls are 1.6 mm and the bottom is 0.9 mm thick. In the shop where we bought it they didn't have such a box in stock, hence I quickly designed it in Tinkercad.