July 2024 Purchased on Rakuten. Selling because it didn't suit me. I used a towel or another pillow underneath, so I think there's almost no dirt, but I washed the cover only. The official packaging was folded in half for shipping, so there's a slight crease in the middle from the beginning. It will be shipped folded in half in a cardboard box. Please consider purchasing if you understand that this is a used item. Flat: Width: Approximately 580mm x Depth: Approximately 300mm x Thickness: Approximately 30mm / Approximately 40mm (longest part)