3 Size options: Small 120x30, Medium 150x40, and Large 180x50.

Edit the text to put your name or a funny phrase. In Bambu Studio, Click on the Objects tab, then right click on the text object. That should pull up a window to edit the text. There you can change the text itself, font and size.

After you edit the text, verify that both the text and the surface of the bookmark are on the first layer. Sometimes editing the text alters it's location.

Make sure to let the plate fully cool down before you remove the bookmark to prevent warping.