I purchased this to alleviate pain after childbirth. I used it for about two months postpartum and have since stored it at home. The cover is removable and washable, so it's clean. I believe I've washed the cover several times, so as you can see in the photos, the fabric around the zipper is worn, and the tag is faded. The packaging has been opened and stored at home, so please be aware of this before purchasing. I will home-clean the cover and wrap it in cushioning material before shipping. Size: [Outer Circumference]: 40cm (length) x 32cm (width) x 6.5cm (thickness) [Hole]: 17cm (length) x 10cm (width) Weight: Approximately 400g - Memory foam, portable Donut-shaped round cushion, hole-shaped cushion Donut cushion, coccyx, firm, donut seat cushion Sitting, buttocks, donut cushion, preparation for childbirth High-resilience cushion, low-resilience cushion Type: Play mat/Joint mat Type: Sunny mat/Cushion