These are a set of collaboration mouse pads that was sold exclusively to visitors at the "Ultimate National Treasure: Great Armor Exhibition" held at the Kasuga Taisha National Treasure Hall from July 5th to September 7th, 2025.There's very little information outside of that about these mouse pads, so I apologize for the lack of information. These specific ones were imported in very recently, so the price has been placed to account for import fees. The size of the mouse pads is present in the pictures. Please understand the measurements are a rough ballpark, as no official measurements are readily available.