This is a super simple design, but I figured I’d share and maybe save someone else the 20 min it took to figure out measurements and design them.
These are risers (cut from 1/8" stock) that take up pretty minimal space when not in use. They’re sized for a crumb tray depth of 1.367"; one set for materials between 0.5" and 1.0" thick, and the other for materials between 1" and 1.5".
The itty bitty gray spot right here is the SVG file —>
When you upload a file, discourse puts in markings that look something like ![Risers|20x12](upload://yadayadayada.svg). If you change that 20x12 to something bigger, like 800x480 then the image will take up more visual space.
Right click on the SVG file and choose Save As to download it to your desktop. (It’s the tiny gray dot in the first post, or the larger version in @markwal’s post.)