If you’re deciding between the Brondell Swash SE600 elongated or round, the answer comes down to one thing — the shape of your toilet bowl.
This guide breaks down exactly how to tell which version you need, what happens if you pick the wrong one, and the best alternative now that the SE600 has been updated.
Always Match Your Toilet Bowl Shape
The single most important rule when buying any bidet seat is this: match the seat to your toilet bowl.
If you have an elongated toilet, you need an elongated bidet seat.
If you have a round toilet, you need a round bidet seat.
This isn’t a preference — it’s a fit issue.
Installing an elongated seat on a round toilet causes the front of the bidet to extend beyond the edge of the bowl, leaving an unsupported overhang.
That overhang is uncomfortable to sit on, creates a gap where you can miss the bowl, and over time puts stress on the seat housing that can cause cracking or damage.
Going the other way — putting a round seat on an elongated toilet — leaves your bowl partially uncovered at the front, which creates hygiene concerns and looks wrong.
For more on this, our full guide on installing a bidet on any toilet walks through exactly what to measure and what to watch for.
How to Tell If Your Toilet Is Elongated or Round
The easiest way to find out is to measure your toilet bowl from the mounting holes at the back to the outer front edge of the rim.
If that measurement is around 18–19 inches, you have a round toilet.
If it’s closer to 19–20 inches, you have an elongated toilet.
You can also look at the bowl shape from above — elongated toilets have a noticeably oval shape, while round toilets are more circular.
Elongated toilets are more common in North American bathrooms, especially in newer homes, and generally provide a larger seating surface.
Round toilets are often found in smaller bathrooms because they take up about two inches less space from the wall, giving you a bit more clearance in tight layouts.
If you’re unsure, our guide to the best bidets for round toilets explains how to identify your bowl shape with a tape measure in under a minute.
Does the SE600 Come in Both Shapes?
Yes — the Brondell Swash SE600 was offered in both elongated (SE600-E) and round (SE600-R) versions.
Both shared the same full feature set: oscillating stainless steel nozzle, front and rear wash, warm air dryer, heated seat, deodorizer, LED nightlight, and wireless remote control.
The only difference between the two was the seat dimensions to match the respective toilet bowl shape.
So whichever version you needed, the experience and features were identical — you simply ordered the right shape for your toilet.
However, the SE600 has since been discontinued by Brondell, and the updated model carrying the same feature set is now the Brondell Swash DS725, which is also available in both elongated and round configurations.
The Brondell Swash DS725: The Current Replacement
The DS725 is a direct successor to the SE600, maintaining the same accessible price point and core feature set while refining the build quality and warranty coverage.
You get rear and front wash with adjustable temperature and pressure, an oscillating stainless steel nozzle with gentle massage pulse, a heated seat, warm air dryer, activated carbon deodorizer, and an LED nightlight — all controlled by the included wireless remote.
The DS725-RW fits round toilets and measures approximately 14.9″ W × 19.5″ L × 6.1″ H.
The DS725-EW fits elongated toilets and measures approximately 14.9″ W × 20.7″ L × 6.1″ H.
Installation is DIY-friendly with no plumber required — most users complete the setup in under 45 minutes.
The DS725 also backs the seat with a 3-year warranty, which is notably longer than what competitors offer at this price tier and reflects Brondell’s confidence in the build.
Check its current price on Amazon
What About Comfort Differences Between the Two Shapes?
Some buyers wonder if the elongated version is more comfortable simply because it’s larger.
The honest answer is: it depends on your body and your toilet.
Elongated seats provide a longer seating surface, which taller users and those with larger frames tend to prefer.
Round seats are slightly more compact, which can actually feel more natural for users who prefer a snugger fit.
The nozzle position, wash settings, and heated seat feel identical on both versions — the shape only affects how the seat sits on your toilet bowl, not how the bidet functions.
If you’re debating between models at different price points rather than just seat shapes, the bidet toilet seat comparison chart is a great resource for putting multiple options side by side.
What Happens if You Order the Wrong Shape?
If you accidentally order the elongated version for a round toilet, you’ll notice the front of the seat overhangs beyond the bowl edge.
It won’t mount securely, creates an uncomfortable sitting angle, and poses a real risk of cracking the seat housing where it’s unsupported.
Most retailers allow returns within 30 days on bidet seats as long as they are unopened or unused, so always double-check your measurement before opening the packaging.
This is one of the most common bidet-buying mistakes covered in our guide to the best bidets for existing toilets — and it’s entirely avoidable with a 60-second measurement.
Round vs Elongated: Quick Decision Guide
1. Measure your bowl first. From mounting holes to the outer front rim: 18–19 inches = round; 19–20 inches = elongated. This is the only decision that matters.
2. Don’t guess based on how your toilet “looks.” Many round toilets appear slightly oval due to the toilet brand’s design language. Measure; don’t eyeball.
3. Verify the toilet manufacturer’s spec sheet if possible. If you know your toilet brand and model number, you can usually find the bowl shape listed in the product documentation online.
4. Both versions of the Brondell Swash DS725 offer the exact same features. Seat shape does not affect water temperature, pressure settings, nozzle type, dryer, or any other function.
For more side-by-side comparison of Brondell against other top brands, see our review of the Brondell Swash 1400 vs TOTO Washlet S5 and the Brondell Swash CL1700 vs TOTO Washlet S2.
Frequently Asked Questions
Is the Brondell Swash SE600 still available?
The SE600 has been discontinued by Brondell and is no longer in regular production.
The current equivalent is the Brondell Swash DS725, which carries the same feature set — stainless steel nozzle, oscillation, warm air dryer, heated seat, deodorizer, nightlight, and wireless remote — at a similar price point.
If you find an SE600 listed for sale, verify it is new stock and not a return or refurbished unit before purchasing.
Can I use the elongated SE600 or DS725 on a round toilet in a pinch?
This is strongly not recommended.
An elongated seat on a round toilet will overhang the bowl at the front, leave a gap that creates hygiene problems, and put stress on the seat structure that can lead to breakage over time.
Both the SE600 and DS725 were made in round and elongated versions with identical features — there is no reason to force a mismatch when the right shape is available.
Do elongated and round versions of the DS725 have the same features?
Yes, completely.
The only difference is the seat length: the elongated version (DS725-EW) is about 1.2 inches longer than the round version (DS725-RW) to match the respective toilet bowl dimensions.
All wash settings, nozzle functions, heated seat, air dryer, remote, and warranty are identical across both shapes.
Are there bidet seats that work on both elongated and round toilets?
No standard electric bidet seat is designed to fit both — the mounting and seat dimensions are specific to each bowl shape.
A few bidet attachment models (non-electric, clamp-style units) advertise “universal fit,” but even those typically fit one shape better than the other.
The right approach is always to match the seat shape to your toilet, which is covered in detail in our best bidets under $300 guide and our broader look at the best bidets for home use.
Conclusion
The Brondell Swash SE600 elongated vs round question has one clear answer: get the version that matches your toilet bowl.
Measure from the mounting holes to the front rim — round if you land around 18–19 inches, elongated if you’re at 19–20 inches — and order accordingly.
Since the SE600 has been discontinued, the Brondell Swash DS725 is the natural next step, offering the same feature package with an improved 3-year warranty and the same easy DIY installation in both shapes.
If you’re still comparing your options before committing, our guide to the best heated bidet toilet seats and our best self-cleaning bidets roundup can help you find the right fit at every budget level.
