Thank you for viewing. These are all geometric cubes made of plaster. Each has a plaster seal on the back. The size is G-802, a rectangular prism with a height of 22cm. I believe it's the common size you might see in classrooms, etc. Please be aware that there are signs of use, stains, and chips. If you would like to see detailed photos of a specific cube, please feel free to comment, and I will upload them individually. *I am not considering selling these individually. They are only sold as a set, thank you for your understanding.*