This is a set of building blocks packed tightly in a 26x26x4.5cm wooden box. The base building blocks have sides of 3cm each (for circles, this refers to the diameter, and for squares, the side length). I liked that they didn't scatter because you have to think like a puzzle when putting them away. Upon close inspection, there are some minor scratches on the wood, but since they are wooden, it's not something I personally mind, and I don't think they show much wear. Please refrain from purchasing if you are concerned about minor details.