Said It Here

How to figure out what toilet seat shape I have

Standard round and elongated shapes often fail to match older or unique bowl dimensions, causing standard replacements to overhang at the front. Without a visible model number to buy a direct replacement, people are left guessing and unable to find a seat that fits properly.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Looking for a model number to replace like for like

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/Plumbing2 people · September 2026

I am struggling to identify what shaped toilet seat I have.source ↗

according to the measurements these are all too long and would overhang at the front.source ↗

I was hoping to find a model number and replace like for like but I can’t seem to find one.source ↗

hebejosnsks-s · r/Plumbing · 2 upvotes

Sorry I’ve really never felt so stupid but the measurements of a round still seem to hang over at the front.source ↗

apprenticegirl74 · r/Plumbing · 2 upvotes

Where this came up

People with this problem also raised