What is the most common pallet in the United States?
I'm working on a chair design that will be made of one pallet only and that can be build with as less requirements as possible (preferably reusing the pallet's nails). I'm almost finished with the design made of a 42 x 42 inch ISO pallet and the 40 x 48 inch pallet, because I heard these are used mostly thoughout the world. As I live in Europe I don't know if these pallets are accessible to 'ordinary people' in the US.
Are there any more common pallets in the US that are suitable for building this chair?
If anyone is familiar with what pallets are used in third world countries (if any specific) that are suitable for building this chair?