Toilets in the US use either the regular bowl or the elongated bowl.
Any off the shelf seat will work.
I put in my new Ultramax. I like the toilet. But the toilet seat profile is uncomfortable. The seat is too deeply contoured and causes pressure on my backside.
Does anyone have a suggestion for changing out the seat? I still have contractors here doing the bathroom remodel and I would like to get it changed.
They were not aware of the Toto. Big box stores don't care them. I found a nice independent plumbing supply who got me one in a day.
Now if I can must make it a bit more comfortable.