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GL42 Round Starburst Glass Vessel Sink
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Square Ceramic Undermount Bathroom Basin, Glossy White Vitreous China
SN029 -
24-Inch Rectangular Ceramic Undermount Bathroom Sink, Extra Large
SN026 -
22-Inch Rectangular Ceramic Undermount Vanity Basin with Overflow
SN025 -
Popular20-Inch Rectangular Ceramic Undermount Vanity Sink with Overflow
SN018 -
PopularDeep Rectangular Ceramic Undermount Bathroom Basin, 8-Inch Bowl
SN017 -
PopularNarrow Rectangular Ceramic Undermount Bathroom Sink, 21 Inch
SN016 -
Small Rectangular Undermount Ceramic Bathroom Sink, 18-Inch
SN015B -
PopularCompact 18-Inch Rectangular Ceramic Undermount Sink with Overflow
SN015 -
Rectangular Undermount Ceramic Sink Without Overflow, 20-Inch
SN012 -
Deep Oval Undermount Ceramic Bathroom Sink With Overflow
SN007 -
Popular18-Inch Oval Ceramic Undermount Vanity Basin with Overflow
SN005 -
PopularSmall Oval Ceramic Undermount Bathroom Sink with Overflow
SN004 -
Compact Oval Undermount Ceramic Basin, 15-Inch With Overflow
SN001 -
22-Inch Oval Ceramic Undermount Bathroom Sink with Overflow
SN013A -
Shallow Rectangular Ceramic Undermount Bathroom Sink with Overflow, 20.5"
SN019 -
Large Rectangular Undermount Ceramic Basin, 22-Inch Wide
SN040 -
Square Undermount Ceramic Bathroom Sink, 17-Inch With Overflow
SN039 -
16-Inch Round Undermount Ceramic Bathroom Sink With Overflow
SN038 -
17-Inch Round Undermount Ceramic Basin, Deep Bowl With Overflow
SN037 -
Compact Round Undermount Ceramic Basin, 16-Inch With Overflow
SN036 -
Elongated Oval Ceramic Undermount Bathroom Sink with Overflow, 22.8"
SN027 -
Compact Rectangular Ceramic Undermount Bathroom Sink with Overflow, 18"
SN024
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12 editions of the International Builders' Show (IBS).
Factory documentation
Certification scope depends on the selected model and destination market. Request model-specific documents with your quotation.
Undermount range at a glance
Undermount bathroom sink sizes, shapes and bowl heights in this range
Every undermount bathroom sink in this collection is supplied to distributors, contractors and project buyers. Undermount bathroom sinks are installed beneath the countertop for a clean edge, so the cutout, not a visible rim, frames the bowl. Of the 23 models, 22 are glossy white vitreous china bowls specified for undermount installation; the remaining model, GL42, is a tempered art glass round whose specs give an above-counter (vessel) mount, so check its mounting before you schedule it under a counter.
- 385–610 mm
- bowl width (15.2" to 24.0") across the 21 ceramic models with a published size
- 170–225 mm
- overall height, from SN019 and SN038 (6.7") to SN040 (8.9")
- 11 · 8 · 2 · 1
- rectangular, oval, square and round ceramic models
- 20 pcs
- MOQ per ceramic model; GL42 glass is 100 pcs
Front-to-back depth runs from 300 mm on the SN024 to 460 mm on the SN040, so check both dimensions when comparing sink models of similar width.
Eight-model size table
Width, front-to-back and height for eight undermount sink models
These eight undermount bathroom sinks span the full width range and every ceramic shape, all in the same glossy white finish. Sizes are overall width × front-to-back × height as listed in each model's specs; the overflow column follows the model name.
| Model | Shape | Finish | Size (in) | Size (mm) | Overflow | MOQ | |
|---|---|---|---|---|---|---|---|
 Compact Oval Undermount Ceramic Basin, 15-Inch With Overflow | SN001 | Oval | Glossy White | 15.2 × 12.2 × 8.1 | 385 × 310 × 205 | Yes | 20 pcs |
 16-Inch Round Undermount Ceramic Bathroom Sink With Overflow | SN038 | Round | Glossy White | 16.5 × 16.5 × 6.7 | 420 × 420 × 170 | Yes | 20 pcs |
 Square Undermount Ceramic Bathroom Sink, 17-Inch With Overflow | SN039 | Square | Glossy White | 17.4 × 17.4 × 7.3 | 440 × 440 × 185 | Yes | 20 pcs |
 Compact Rectangular Ceramic Undermount Bathroom Sink with Overflow, 18" | SN024 | Rectangular | Glossy White | 17.9 × 11.8 × 6.9 | 455 × 300 × 175 | Yes | 20 pcs |
 Rectangular Undermount Ceramic Sink Without Overflow, 20-Inch | SN012 | Rectangular | Glossy White | 20 × 14.6 × 7.5 | 510 × 370 × 190 | No | 20 pcs |
 Large Rectangular Undermount Ceramic Basin, 22-Inch Wide | SN040 | Rectangular | Glossy White | 21.7 × 18.2 × 8.9 | 550 × 460 × 225 | Confirm on drawing | 20 pcs |
 Elongated Oval Ceramic Undermount Bathroom Sink with Overflow, 22.8" | SN027 | Oval | Glossy White | 22.8 × 15.2 × 7.9 | 578 × 385 × 200 | Yes | 20 pcs |
 24-Inch Rectangular Ceramic Undermount Bathroom Sink, Extra Large | SN026 | Rectangular | Glossy White | 24.0 × 15.0 × 7.1 | 610 × 380 × 180 | Confirm on drawing | 20 pcs |
Across the 22 ceramic models, 15 names state an overflow, SN012 is the one built without, and six (SN016, SN015B, SN017, SN026, SN029, SN040) should be confirmed on the drawing.
Oval or rectangular?
Oval undermount sink or rectangular, and is there a standard size?
There is no single standard size for an undermount bathroom sink in this range: the 21 ceramic models with a published size run 385–610 mm wide, so read the length and front-to-back of each model from its own specs.
Compare each sink shape group by its real dimensions. The 11 rectangular models run 455–610 mm wide and 300–460 mm front to back. By length, the rectangular undermount sink line runs from the 455 mm SN024 to the 610 mm SN026, with five models clustered between 510 and 530 mm.
The 8 oval models run 385–578 mm wide and 310–430 mm front to back. That group includes SN036 and SN037, two circular bowls sized Ø400 and Ø430 mm, plus the elongated SN027 at 578 mm, the longest oval undermount bathroom sink in the range.
The smallest footprints are the SN001 oval (385 × 310 mm) and the SN024 rectangle (455 × 300 mm). For a square plan, SN039 measures 440 × 440 mm; SN029 is also square, and its size should be requested with the drawing.
All 22 ceramic models share one glossy white finish, so a bathroom sinks schedule that mixes an oval undermount bathroom sink in one room with a rectangular undermount sink in another stays in a single finish.
Shared ceramic spec
What the 22 ceramic undermount bathroom sinks have in common
- Body
- Vitreous china ceramic on all 22 ceramic models
- Finish
- Glossy White on all 22; custom glaze finishes on request
- Installation method
- Undermount: bowl fixed beneath the countertop, no visible rim on the counter surface
- Width range
- 385–610 mm (15.2"–24.0")
- Overall height range
- 170–225 mm (6.7"–8.9")
- Tap holes
- Tap-hole drilling available on request
- MOQ
- 20 pcs per ceramic model, quoted per order
Project shortlist
Six undermount vanity sink models picked from 22 ceramic bathroom sinks
Each pick below is tied to a single measurement or feature, from the oval undermount bathroom sink with the narrowest bowl to the widest rectangular undermount sink, so the shortlist can go straight into a bathroom sink schedule.
Narrowest bowl385 × 310 mm with overflow, the narrowest width in the range, tied with SN007 as the tallest oval at 205 mm.
Deepest front to back550 × 460 × 225 mm, the greatest front-to-back depth and overall height of the 22 ceramic models.
Widest610 mm (24.0") wide, the widest of the 22 ceramic models; overflow to be confirmed on the drawing.
No overflow510 × 370 × 190 mm rectangle made without an overflow, for specifications that call for a bowl without one.
Elongated oval578 × 385 mm, the longest oval, with overflow.
Square440 × 440 × 185 mm with overflow, the square bowl with a published size.Cutout to PO
Countertop cutout to purchase order: five steps
Pick each sink by measurements
Choose the sink model from the width, front-to-back and height in its specs, then measure the vanity cabinet interior space and the countertop the undermount sink will sit in.
Share the countertop drawing
Send the vanity top drawing and material, such as natural stone or solid surface. A fabricator typically cuts from the sink drawing, so share it early to create the cutout template and agree the reveal and fixing before making the cut.
Confirm overflow and tap holes
State whether each undermount sink needs an overflow and where the faucet goes; drilling is done on request.
Set quantities
Order 20 pcs or more per ceramic model, or 100 pcs for the GL42 glass round; pricing is quoted per order, and any durability or glaze test data your project needs can be requested with the quote.
Add branding
For a private-label line or a new sink program, add logo or carton requirements through our OEM/ODM service, and our team replies in writing.
Factory-Direct Supply
The ceramic undermount bathroom sinks are manufactured in SANIKB’s own ceramic factory in vitreous china. SANIKB Group manufactures non-ceramic lines through group-controlled production using SANIKB-owned moulds or tooling, group specifications and group QC. Check the selected model’s material and mounting specification before adding it to an undermount basin schedule. MOQ is one full 20ft container per supplier, which you mix freely across ceramic basins, toilets and other categories in a single shipment.
Why Choose Undermount Over Drop-In Basins
Undermount basins mount beneath the countertop, leaving a clean uninterrupted surface with no exposed rim. This makes wiping water and debris straight into the bowl effortless and gives projects a premium, seamless look that suits stone and solid-surface vanity tops. Drop-in models sit on top with a visible lip; undermount installation reads as higher-end, which helps importers and contractors position bathrooms at stronger price points.
Sizes, Bowl Dimensions and Template Fit
Use the selected model drawing to compare overall footprint, bowl opening and drain position with the vanity top and plumbing layout. This collection includes different materials and mounting records, so confirm that the chosen model is specified for undermount installation before preparing a cutout. Agree the reveal, rim profile, countertop material, support and fixing method with the fabricator and installer. Request the current cutout or dimensional drawing and faucet layout before fabrication; do not infer internal bowl depth from the basin’s overall height. Send model codes, quantities and countertop drawings with the inquiry to confirm the documentation and supply scope.
OEM, ODM and Private Label
Because these basins come straight from our ceramic factory, we support OEM, ODM and private-label programs for distributors and brands. Send your drawings for OEM tooling, adapt an existing mould through ODM, or apply your logo, packaging and printed cartons under private label. Our service and efficiency keep sampling and production lead times tight, so your branded undermount bathroom sink line reaches market on schedule and on budget.
Quality, Compliance, Service and After-Sales
Every undermount basin is inspected for glaze integrity, dimensional accuracy and water absorption before it ships, and we support the certifications importers require. Strong service and replies within 12 business hours sit behind each order. After-sales responsibility is firm: any defective goods are replaced or fully compensated, and we never shirk responsibility. That commitment, plus a full price range, lets you order with confidence across entry-level and premium tiers.