Round vs Elongated Seats

Per North American plumbing standards, all toilets are either round or elongated (AKA oval or oblong).

Measure your toilet, not your toilet seat to determine if you need a round or elongated toilet seat. NOTE: Measure from the seat mounting holes to the front, top edge of the bowl (see diagram link below).
- Elongated bowls = 18.5 inches
- Round bowls = 16.5 inches

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To select round or elongated on the product page, please scroll down to locate the SIZE field, and click it -- the drop down feature allows you to select round or elongated.

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