This is a recreation of the Hot Wheels retail packaging that the cars are sold in, minus the plastic blister that holds the actual car.  I needed this for the display stand that I created to fit a 1:18 scale model, which can be found here:

https://www.printables.com/model/703697-hot-wheels-model-display-stand

This model maintains the same X/Y aspect ratio of the original retail packaging based on measurements and drawings that I found online, however it may not match some of the newer packaging that's shorter so just scale it up or down to suit your needs.  Due to it being thin, it's best printed with a brim to help keep it flat on the build plate and avoid warping.