 You can design custom enclosures for your DIY projects using 3D models from Adafruit. These allow you to create designs that feature accurate measurements, so you can get exact dimensions without having to guess or rely on measuring parts with calipers. The 3D models are available to download for free on GitHub, links are in the description. Each part features the product ID so it's easy to search and find exactly what you're looking for. Included are files in open formats such as STAP and STLs but also the original Fusion 360 file. You can also view a GIF or JPEG image of the part to see the model before you download it. If you can't find what you're looking for, you can submit a parts request using the issues tab. You can also contribute by submitting your own parts to the repo. Just follow the same naming convention and submit a pull request. For more documentation, be sure to check out the guide on learn.adafruit.com.