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How this guide was built: This is a research-based comparison. We have not hands-on tested these seats. Picks are based on manufacturer and retailer specifications, especially height, length, width, bowl fit, control type, and heating type, because those decide whether a seat works in a small bathroom.
Price checked: November 2026
Verdict: Our best pick for most small bathrooms
Best pick: Brondell Swash Thinline T44
The T44 is the clearest answer if bulk is your problem. Brondell lists it at just 3.9 inches high, well below the 5.3 to 5.7 inches of the other electric seats here, in round and elongated. Its wireless remote adds no width at the hip, and its instant ceramic heater gives endless warm water with no tank housing. For less money, see the Alpha Bidet JX2 or Brondell Swash LE99. With no outlet, see the Kohler PureWash M250.
[CHECK PRICE – LINK PENDING]
At a glance
| Model | Dimensions / footprint (L x W x H) | Round / elongated fit | Control | Price |
|---|---|---|---|---|
| Brondell Swash Thinline T44 | Round: 19.6 x 15 x 3.9 in; Elongated: 20.7 x 15 x 3.9 in | Both | Wireless remote | $559.99 on Brondell.com (list $699.99) |
| Alpha Bidet JX2 | Round: 19.4 x 15 in; Elongated: 20.8 x 15.1 in; height [UNVERIFIED] | Both | Wireless remote | $369.00 round / $389.00 elongated |
| Coway Bidetmega 400S | Round: 19.54 x 15.3 x 5.31 in; Elongated: 20.9 x 15.3 x 5.31 in | Both | Wireless remote | $599.00 |
| TOTO Washlet S5 | Round: 19-1/8 x 15-1/16 x 5.5 in; Elongated: 21 x 15-1/16 x 5.5 in | Both | Wireless remote | $665.00 elongated / $682.00 round |
| Brondell Swash LE99 | Round: 19.5 x 15.9 x 5.7 in; Elongated: 20.7 x 15.9 x 5.7 in | Both | Wireless remote | $399.99 |
| Kohler PureWash M250 | Elongated: 18.68 x 17-3/4 x 7/8 in; Round: 18-9/16 x 17-3/4 x 1-1/16 in | Separate models | Side lever (manual) | $119.97 elongated on Kohler.com |
Height is at the rear housing, where low tanks cause trouble. Length separates round from elongated.
The picks in detail
1. Brondell Swash Thinline T44 — Best for small bathrooms overall
The T44 keeps the rear housing low: 3.9 inches high in both sizes, below a standard electric seat. That helps with low or curved tanks, and in rooms where a tall seat would dominate. Brondell lists instant ceramic heating for endless warm water, heated seat, warm air dryer, self-cleaning stainless nozzle with five positions, carbon deodorizer, three-color nightlight, and a wireless remote for two users. Cord: 3.9 feet. Warranty listed: limited 3-year tiered, residential.
Pros
- Lowest profile here at 3.9 inches, round and elongated
- Tankless instant heating, no tank to run cold or add bulk
- Remote keeps width to 15 inches, no side arm
- Sittable, gentle-close lid
Cons
- Priced well above the LE99 and JX2
- Needs a GFCI outlet within its 3.9-foot cord
- Round version is 19.6 inches long, so check front clearance too
[CHECK PRICE – LINK PENDING]
2. Alpha Bidet JX2 — Best value with tankless heating
The JX2 is the lower-priced way to get tankless, on-demand heating for endless warm water, in round and elongated fits. Retailer listings give round at 19.4 x 15 inches and elongated at 20.8 x 15.1 inches, with wireless remote, stainless nozzle, warm air dryer, heated seat, LED nightlight, bowl mist, and sittable lid. Retailer listings name a 3-year warranty.
We could not verify the JX2 rear height from a manufacturer specification page, so its height is [UNVERIFIED] above. If tank clearance decides your purchase, confirm it with the seller first, or choose the T44, where height is published.
Pros
- Tankless endless warm water at a mid-range price
- Round fit, which many mid-range electric seats skip
- Remote, dryer, and sittable lid included
Cons
- Rear height [UNVERIFIED] from a manufacturer source
- Needs a nearby GFCI outlet
- Less widely stocked than TOTO or Brondell
[CHECK PRICE – LINK PENDING]
3. Coway Bidetmega 400S — Compact seat with a two-way cord
The 400S is mid-sized: 5.31 inches high, 15.3 inches wide, 19.54 inches long in round or 20.9 inches in elongated. Coway lists heated seat, dryer, nightlight, stainless nozzles, front and child modes, and wireless remote. Retailer descriptions describe instantaneous heating; Coway’s own specifications page we checked did not state the heating method, so treat that point as retailer-sourced.
Its useful detail is a 47-inch, 2-way cord that can exit either side, helpful when the outlet is on the wrong side of the toilet.
Pros
- Narrower than the LE99 at 15.3 inches wide
- Two-way 47-inch cord for awkward outlet placement
- Round and elongated at the same listed price
Cons
- At 5.31 inches high, not in the T44 slim class
- Heating method not stated in Coway specifications we reviewed
- Priced close to the T44 and S5, which publish fuller specs
[CHECK PRICE – LINK PENDING]
4. TOTO Washlet S5 — Premium pick for round toilets
The S5 is TOTO’s current instant-heating Washlet in this tier, replacing the discontinued C5. Retailer Premier Bidets lists elongated at 21 inches long and round at 19-1/8 inches long, both 15-1/16 inches wide and 5-1/2 inches tall at the back. It heats instantly, and its remote saves settings for up to four users. Also listed: heated seat, warm air dryer, deodorizer, PREMIST bowl mist, EWATER+ wand cleaning, nightlight, and SoftClose seat and lid.
That retailer requires 5.5 inches between mounting holes, at least 2 inches from tank to mounting bolts, and a GFCI outlet within 3 feet, and warns it will not fit French-curve toilets, where the tank meets the bowl on a curved slope.
Pros
- Instant heating, four presets, and a true round version
- Published fit requirements, including 2-inch tank clearance
- Seamless seat, no back gap to collect dust
Cons
- Most expensive seat here in round form
- 5.5 inches tall at the back, not low-profile
- Will not fit French-curve toilets, per the retailer
[CHECK PRICE – LINK PENDING]
5. Brondell Swash LE99 — Best budget remote electric seat
The LE99 gives up slimness to save money: 5.7 inches high and 15.9 inches wide, the widest electric seat here. For $399.99 on Brondell.com you still get a wireless remote, heated seat, warm air dryer, self-cleaning stainless nozzle, nightlight, and presets, in round (19.5 inches long) and elongated (20.7 inches long).
The trade-off is heating. Brondell lists a hybrid system, not fully tankless instant heating, so warm water is extended over a basic tank but not endless like the T44, JX2, and S5. Cord: 3.9 feet. Warranty listed: 1-year limited.
Pros
- Lowest price here for a remote electric seat with dryer
- Round and elongated, both with full dimensions
- Heated seat, nightlight, and stainless nozzle
Cons
- Tallest, widest electric seat here at 5.7 x 15.9 inches
- Hybrid heating, not endless tankless heating
- 1-year warranty, shorter than the T44 and JX2
[CHECK PRICE – LINK PENDING]
6. Kohler PureWash M250 — Best if you have no outlet
Older small bathrooms often have no outlet near the toilet, and adding one can cost more than the seat. The M250 skips electricity: a side lever controls a single adjustable spray wand from the toilet supply, with ambient water only. Kohler lists a low-profile design, Quiet-Close lid, quick-release hinges, and no batteries or electricity required.
Order by shape: elongated K-5724 and round-front K-76923 are separate. Kohler lists elongated at 18.68 x 17-3/4 x 7/8 inches and round at 18-9/16 x 17-3/4 x 1-1/16 inches. That width includes the side control, so you need side clearance for lever and hand.
Pros
- No outlet, cord, or batteries needed
- Lowest price here by a wide margin
- Very low profile, standard-seat look
Cons
- Ambient water only: no warm water, heated seat, or dryer
- Side lever needs clearance beside the toilet
- Separate models, so a shape mistake means an exchange
[CHECK PRICE – LINK PENDING]
Measure before you buy
- Bowl shape and length. From the center of the mounting holes to the front edge: about 16.5 inches is round, about 18.5 inches is elongated. Buy that shape.
- Tank-to-bolt clearance. From mounting holes to tank. The S5 listing requires at least 2 inches, and French-curve tanks are listed as incompatible. Low tanks are why a slim seat like the 3.9-inch T44 exists.
- Bolt spacing. Most seats here expect about 5.5 inches between mounting holes.
- Side clearance. A remote needs only wall space for its holder. A side-lever seat like the M250 needs open space beside the bowl. Check vanities, tubs, and walls.
- Outlet and cord side. Electric cords here are around 3.9 feet (47 inches on the Coway). Measure to your GFCI outlet and note which side the cord exits. No suitable outlet means the manual M250, or an electrician.
FAQ
Will an elongated seat work on a round toilet?
No, not well. It overhangs the front and can shift on its mounts. Every electric seat here has a separate round version, so order round by its own part number.
Do I need an outlet?
For warm water, heated seat, or dryer, yes: a GFCI outlet within cord reach, roughly 3 to 4 feet here. With no outlet, a manual seat like the M250 is practical, with ambient water only.
Remote or side control in a small bathroom?
Remote, usually. It adds no width and mounts on the wall. A side lever cannot be lost, but needs side clearance and can crowd a toilet near a wall or vanity.
Why does tankless heating matter for size?
A tank or hybrid system needs room to hold warm water, which tends to make the rear housing taller. Instant designs heat as water flows, part of how the T44 reaches 3.9 inches. Trade-off: tankless seats here cost more than the hybrid LE99.
What if my toilet is one-piece or skirted?
Check the manufacturer’s fit guide for that toilet first. Tank junctions and hidden mounting can block a standard bracket. We did not verify one-piece compatibility for every seat here, so treat any unlisted fit as [UNVERIFIED] until confirmed.
Bottom line
For most small bathrooms with an outlet, buy profile first: the Brondell Swash Thinline T44 at 3.9 inches high, in your bowl shape. For tankless heating for less, choose the Alpha Bidet JX2 and confirm its rear height first. For no outlet, the Kohler PureWash M250 is the honest, inexpensive answer.
Sources
- Brondell T44: $559.99 (list $699.99); 19.6/20.7 x 15 x 3.9 in; instant heater — https://www.brondell.com/swash-thinline-t44/
- Brondell LE99: $399.99; 15.9 x 20.7/19.5 x 5.7 in; hybrid heating — https://www.brondell.com/swash-le99-electronic-bidet-toilet-seat/
- Coway 400S: $599.00; 15.3 x 5.31 x 20.9/19.54 in; 47 in cord — https://cowaymega.com/products/bidetmega-400s
- TOTO S5: $665 / $682; 21 / 19-1/8 x 15-1/16 x 5-1/2 in; instant heating; fit requirements — https://premierbidets.com/products/toto-washlet-s5-bidet-seat
- Alpha Bidet JX2 round: $369.00; 19.4 x 15 in — https://www.shopabunda.com/products/alpha-jx-round-bidet-toilet-seat-white-endless-warm-water-rear-and-front-wash-led-light-quiet-operation-easy-wireless-remote-control-low-profile-sittable-lid-3-year-warranty
- Alpha Bidet JX2 elongated: $389.00; 20.8 x 15.1 in; tankless endless warm water — https://www.shopabunda.com/products/alpha-jx-elongated-bidet-toilet-seat-white-endless-warm-water-rear-and-front-wash-led-light-quiet-operation-easy-wireless-remote-control-low-profile-sittable-lid-3-year-warranty
- Kohler M250 elongated K-5724: $119.97; 18.68 x 17-3/4 x 7/8 in; manual — https://www.kohler.com/en/products/toilet-seats-bidet-seats/shop-toilet-seats-bidet-seats/puretide-elongated-manual-bidet-toilet-seat-5724
- Kohler M250 round K-76923: 18-9/16 x 17-3/4 x 1-1/16 in; manual — https://www.kohler.com/en/products/toilet-seats-bidet-seats/shop-toilet-seats-bidet-seats/puretide-quiet-close-round-front-manual-bidet-toilet-seat-76923?id=psm_fbig_kbus_dtc_2025_120213189093300678_f02&skuId=76923-96
Unverified items are marked [UNVERIFIED] in the text and table. Prices and specifications were checked in November 2026 and may have changed since.