This 8x12" 3mm thick expanded PVC sheet is available in multiple colors, and is excellent for building robot frames and shells
We use 3mm Sintra for building many of our robots because of its ability to glue well with epoxy and superglue, it can be easily cut, drilled and threaded for screw fasteners, and comes in white, black, dark blue, yellow and red.
You can easily shape Sintra by immersing it in hot water and bending it to your desired shape while it cools!
Just don't use black Sintra with solar-powered robots - on hot sunny days, it's been known to get soft!
Each sheet is approximately 8" by 12".