This is a set of 5 boxes of Constructive Triangles, from box 1 to box 5. I purchased these but did not use them. I only checked the contents of one box, but I'm not sure which one. The others are still wrapped in the original bubble wrap from when I bought them. I would like to sell them as they are, so please understand the above before purchasing. The following is the description from when I purchased them: Boxes 2 and 5 have been opened, the others are unopened. Box 2 has only been opened and not used, but the corner is peeled as shown in the third photo. Box 5 has some small scratches as shown in the photos. The description at the time of purchase stated that there may be some items with peeled corners or small scratches, but these are not considered defective, so please be aware of this. These are the standard size according to Montessori international standards. This is an essential teaching aid for learning elementary geometry. Various shapes and colors of triangles. You can visually understand how to combine triangles of the same area and shape to form other shapes. Popular keywords: Montessori