These project sheets are 25" (625mm) x 26" (660mm) x 0.26" (.66mm). I have used these for many projects. They are easy to cut and very durable. They can't be laser cut. I have used them for wearable projects as well. This polyethylene sheets are also very good for work surface protection. They realy have a 1001 uses.
Polyethylene are recyclable materials. Most municipalities take polyethylene, which is the same material as milk jugs.