Skip to main content
All Insights

Finding the Right Fit: Your Guide to Measuring Your Toilet Seat

Published: January 22, 2024

Ready for a crash course in toilet seat sizing? We’ve got your back, or should we say, your… well, you know where!

Did you know elongated toilets didn’t exist until the 1950’s? Most modern construction now uses elongated versions, unless it’s a small space. Knowing the difference between a round or elongated toilet bowl is more important than you would think as toilet seats are sold by shape and not by length.

Figuring out the size of your toilet seat can be a bit tricky, but with a simple tape measure and Casana’s visual guide, getting down to business is easy.

Step One: Place the tape measure’s hook at the midpoint between the bolt holes of your toilet and extend it to the outer edge of the toilet bowl rim in front.

Step Two: Compare the result with the average length for each shape. You can expect a round bowl to have a length somewhere around 16 ½ inches. If you’re dealing with an elongated bowl, it should be closer to 18 ½ inches.

When shopping for a new toilet seat, most packaging in the United States will clearly state either round or elongated, but if your toilet doesn’t quite measure up to one or the other consider asking a store associate to help you find your perfect match.

You’ve reached the best news of the process – it only gets easier from here. Removing and replacing your toilet seat is as simple as unscrewing two bolts. Most people can do the task in just a few minutes!

Casana’s Heart Seat® is currently only available for elongated toilets.