I purchased a toilet step stool from Rakuten, from the Okawa Kagu shop. The surface has a smooth coating, giving it a luxurious feel. It's a heavy-duty construction, requiring considerable force to fold and unfold. It's a shame the photos don't convey this, but you'll understand the quality when you see it in person. My child wiped it down every time they used the toilet, so there are no visible stains. I will disinfect it before shipping. The opening type is the standard type, and the height is 20 cm. Reference URL ↓ "Okawa Kagu" Antibacterial Coated Clean Toilet Training Step/Step Stool [Rakuten] https://item.rakuten.co.jp/kakurenbo/t_step2-timesale2/?scid=wi_ich_androidapp_item_share #Rakutenichiba This wooden toilet step stool features a wide top and stability, with a weight capacity of 8kg, allowing for safe use. - Type: Toilet Step Stool - Weight Capacity: 8kg - Material: Wood