Bidet seat sizes, which size seat do I need?

Bidet seat sizes, this is probably the question that we get the most. The answer is most likely yes! We can make a bidet toilet seat fit pretty much all two piece toilets and some, but not all one piece toilets. If your one piece toilet has more of a right angle where the tank meets the base, most likely it will work. Some one piece toilets are a french curve design. The Kohler Rialto and San Raphael models are two popular ones. The only bidet seat we offer to fit these models is the Alpha JX. You are welcome to call us with your model to see if our bidet toilet seats fit or not. You can also email us a picture of your toilet.

If your toilet is a two piece where the tank is bolted to the base, our bidet toilet seat fits them. To determine your bidet seat sizes, all you need to do is figure out if your bowl is round or elongated. See the photo below to compare to.

bidet seat sizes

bidet seat sizes   bidet seat sizes


You will need to have at least two inches of clearance between the center of the seat mounting holes and the front edge of the toilet tank. The distance between the centers of the two seat mounting holes are usually between 5″ and 7.5″. If your mounting holes are wider than 7.5″, you will need to contact us to see what options are right for you.

Poor fit is the biggest reason that we get returns on these.  Bidet seat sizes can vary, so we urge you to do your due diligence to make your you are getting the right model for your particular toilet. Not all toilets are alike, and we hope that our bidet toilet seat fits your toilet the best that it can. We are here to answer any questions you may have.

Feel free to email us or call us with your bidet toilet seat fit questions. 800 477-5638