Sizing reference

Standard Bathroom Vanity Dimensions

Vanity sizing looks simple until you try to order. Widths cluster around a handful of standard numbers, depth is quietly the dimension that decides whether a bathroom feels usable, and height has been drifting upward for twenty years without the old number ever officially retiring. This page sets out the sizes that are actually in production, in both inches and millimeters, and the clearances that decide whether a given size works in a given room.

The short answer

Quick Reference

Common widths include 24, 30, 36, 48, 60 and 72 inches.
Standard cabinet depth is 18 to 21 inches, with the top overhanging to about 22 inches.
Two conventions are in circulation: classic height at 30 to 32 inches and comfort height at 34 to 36 inches, both measured to the top of the counter once installed.
Leave at least 21 inches of clear floor in front — that is the minimum in the 2021 IRC for dwellings in the United States, measured to the fixture rather than the cabinet; see the clearances section for scope. 30 inches is far more comfortable.
Suppliers differ in what they hold as a routine range; whether a given size is made to order is confirmed in the quotation for that model.

An ornate floor-standing vanity with a lit mirror panel

Start here

Three Numbers, in Order of Importance

The short answer: single-basin vanities are commonly 24, 30, 36 and 48 inches wide (610, 762, 914 and 1,219 mm); double-basin units are commonly 60 and 72 inches (1,524 and 1,829 mm). Depth is usually 18 to 22 inches (457 to 559 mm), and the counter usually finishes 30 to 36 inches (762 to 914 mm) above the floor.

Where that stops being true: these are manufacturing conventions, not rules. They hold for North American residential stock; they do not hold for compact apartment bathrooms in much of Asia and Europe, for hotel rooms built to a fixed module, or for any wall where the plumbing is already fixed. Two things do carry legal weight in some markets — accessible rim height and the clear floor space in front of the fixture — and both are cited further down.

A vanity has three dimensions and they do not matter equally. Width is what everyone asks first, because it is what the showroom label says. Depth is what actually decides whether two people can pass each other in the room. Height decides whether the person using it every day is comfortable or slightly stooped.

Manufacturers converge on standard widths because sheet material, hardware and shipping cartons are all optimized around them. Where a size matches a maker's existing tooling and carton, it is normally handled as a routine item rather than as a made-to-size one. Whether that affects price or schedule on a particular order depends on the supplier and the quantity, and is answered in the quotation rather than by the size alone. For a project buyer, knowing where the standard boundaries sit is the difference between a routine order and a tooling conversation.

Width: what the catalog calls the size, and what drives price banding
Depth: the dimension that governs circulation and comfort in the room
Height: classic 30 to 32 inches, or comfort 34 to 36 inches
Clearance: the space in front, which no catalog number tells you

Standard Widths

A wall-mounted bathroom vanity in a finished bathroom

Vanity width is measured across the cabinet, not across the countertop, and the top usually overhangs slightly on each side. These are the figures that recur most often in catalogs; other widths exist.

Width (in)	Width (mm)	Typical use	Basins
24"	610	Powder room, tight ensuite	1
30"	762	Small full bathroom	1
36"	914	A common single-basin width	1
48"	1219	Generous single, or a tight double	1 or 2
60"	1524	A common double-basin width	2
72"	1829	Large primary bathroom	2

Below 24 inches you are usually looking at a cloakroom unit rather than a vanity. Above 72 inches, most manufacturers build as a run of linked cabinets under a single continuous top, which is how hotel and apartment projects are normally supplied.

A double basin below 60 inches is possible but rarely pleasant: two bowls in 48 inches leaves almost no landing space between them, and the drawer layout underneath has to work around two sets of plumbing.

Standard Depths

A single-bowl integrated basin vanity top

Cabinet depth is commonly 18 to 21 inches; 21 inches is a frequent example in North American catalogs. The countertop then overhangs the front by roughly an inch, giving a finished depth around 22 inches.

Depth is where most bathroom regret lives. Every inch of depth is an inch taken from the walking space in front, and in a bathroom of 60 to 72 inches across, the difference between an 18-inch and a 21-inch cabinet is very noticeable.

Cabinet depth	Top depth	Suits
16" / 406 mm	17" / 432 mm	Narrow cloakroom, corridor bathroom
18" / 457 mm	19" / 483 mm	Small bathroom where circulation is tight
21" / 533 mm	22" / 559 mm	Standard, and what most basins are designed for

Reduced-depth cabinets constrain the basin. Many integrated basins and most drop-in bowls assume a 21-inch cabinet, so a shallow vanity often needs a shallow-bowl top designed for it. Confirm the basin and the cabinet together rather than separately.

Height: Classic and Comfort

A wall-mounted vanity in a residential bathroom

Three different heights get called "vanity height", and mixing them up is the usual cause of a unit that arrives at the wrong level. Name the one you mean on the drawing:

Cabinet height — the carcass alone, without top or plinth. This is the number on a cabinet spec sheet.
Counter height — cabinet plus countertop. This is what a showroom label usually means.
Finished installed height — floor to the top of the counter once the unit is fixed, including plinth, leveling and floor build-up. This is the one the user actually experiences, and it is worth stating explicitly on an approval drawing alongside the cabinet height.

Two counter heights are in circulation. The classic vanity height of 30 to 32 inches was set when bathroom cabinets were essentially furniture. Comfort height, 34 to 36 inches, matches kitchen counter height and appears frequently in recent residential specifications.

Neither is wrong. Comfort height suits adults and reduces stooping; classic height suits households with children and looks correct under a more traditional cabinet. The one thing that matters is that the decision is deliberate rather than inherited from a catalog default.

Type	Measured to	Height	Notes
Classic	Top of counter, installed	30 - 32" / 762 - 813 mm	Children, traditional cabinetry, lower mirrors
Comfort	Top of counter, installed	34 - 36" / 864 - 914 mm	Convention, not a standard. Common default in North American residential work
ADA-compliant (US)	Front of the rim or counter, whichever is higher	34" / 864 mm maximum	A legal ceiling in scope US projects, not a target. See below

Note that the accessible figure is measured to a different point. Classic and comfort heights are measured to the top of the counter; the ADA limit is measured to the higher of the rim or counter surface, so a vessel basin sitting on a 34-inch counter is already over the limit even though the cabinet is not.

Source — United States. The 2010 ADA Standards for Accessible Design, §606.3 as published by the U.S. Access Board, require lavatories and sinks to be installed with the front of the higher of the rim or counter surface 34 inches maximum above the finish floor. The same guidance sets knee clearance at 27 inches minimum high at the front edge and clear floor space at 30 by 48 inches minimum for a forward approach.

Scope: this applies to facilities covered by the ADA in the United States. It is not a worldwide rule. Projects in Singapore, Malaysia, the EU, the UK and elsewhere are governed by their own accessibility codes, which use different figures and different measuring points. Confirm the standard that applies to your project before specifying to any number on this page. Checked 2026-09-10.

For a wall-mounted vanity, height is set on site by where the cabinet is fixed, which gives useful flexibility but also means the mounting height has to be stated on the drawing rather than assumed. For a floor-standing vanity, the height is built into the cabinet, and the only adjustment available is at the plinth.

The Clearances No Catalog Lists

Two round lit mirrors above a pair of countertop basins

A vanity that fits the wall can still make a bathroom unusable. These are the numbers that decide the difference, and none of them appear on a product page.

Clear floor in front: 21 inches / 533 mm is the residential code minimum in the United States; 30 inches / 762 mm feels comfortable
Centerline to a side wall or vanity: 15 inches / 381 mm minimum in the same code, and 30 inches / 762 mm center-to-center between adjacent fixtures
Side clearance: check the gap the hardware needs to fit and operate, and the space a door or drawer needs to open fully — both come from the fittings specified for that unit
Door and drawer swing: a drawer needs its full depth clear in front of it
Mirror and lighting: plan these against the finished counter height, not the floor
Service positions: waste and supply positions must clear drawer boxes — a frequent source of site problems

For project work, the drawer-versus-plumbing clash is worth resolving on a drawing before production. A drawer that has to be notched around a waste pipe on site is a drawer that will be reported as a defect.

Source — United States, dwellings. The clearance figures are from the 2021 International Residential Code, section P2705.1, Chapter 27 Plumbing Fixtures. Note what they measure: they govern the plumbing fixture — the lavatory, water closet or bidet — not the cabinet it sits in. A fixture is not to be set closer than 15 inches (381 mm) from its centerline to any side wall, partition or vanity, nor closer than 30 inches (762 mm) centerline-to-centerline to an adjacent fixture, and there is to be a clearance of not less than 21 inches (533 mm) in front of it to any wall, fixture or door. The IRC is written for one- and two-family dwellings and townhouses. Which code governs a given project — and which edition of it — depends on what the authority having jurisdiction has adopted, so confirm that locally rather than assuming from the building type.

The IRC is a copyrighted model code, and online access may be read-only or paid. The wording above is corroborated by the same section as adopted in the 2020 Florida Residential Code and the 2021 Virginia Residential Code, which carry it unchanged. Figures move between editions and local amendments: the edition enforced on your project is the one that counts, and your local authority is the reliable source for it. Checked 2026-09-10.

Common questions

Vanity Dimension Questions

Which bathroom vanity sizes are commonly available?

Examples of commonly listed single-basin sizes include 36 inches wide by 21 inches deep in North American catalogs. 60 inches is a commonly listed double-basin width. Whether either is quicker or cheaper than an unusual width depends on the supplier's tooling and current schedule, and is confirmed in the quotation rather than assumed from the size.

What is the standard height of a bathroom vanity?

There is no single standard height; two conventions are in circulation. Both are measured to the top of the counter once installed, which is not the same as the cabinet height on a spec sheet. Classic height is 30 to 32 inches; comfort height is 34 to 36 inches and is the range more commonly specified in recent residential work. Wall-mounted vanities are set to whatever height the drawing specifies.

How deep should a bathroom vanity be?

Cabinet depth is commonly 21 inches, with the countertop finishing around 22 inches — the two are measured to different points, so state which one you mean. Reduced depths of 18 or 16 inches exist for tight rooms, but they constrain which basins will fit, so confirm the basin and the cabinet together.

How much space do you need in front of a vanity?

21 inches (533 mm) is the minimum in the 2021 International Residential Code, measured in front of the plumbing fixture rather than the cabinet, and that code is written for dwellings in the United States. Confirm the code and edition adopted where your project is. 30 inches is more comfortable in use. Remember to allow the full depth of a drawer in front of the cabinet, not just walking space.

Can I order a vanity in a non-standard width?

Yes, but treat it as a made-to-size order rather than a stock pull. Expect a drawing approval step; schedule is confirmed in the quotation. For runs above 72 inches, most projects are supplied as linked cabinets under one continuous top.

Do metric and imperial sizes match?

Not exactly. A 36-inch vanity is 914 mm, which is close to but not the same as the 900 mm module common in metric markets. For project work, state the controlling unit on the drawing so the tolerance is not absorbed silently.

In short

Fit the Room, Not the Wall

Common widths include 24, 30, 36, 48, 60 and 72 inches. Standard depth is 21 inches to the cabinet and about 22 to the countertop. Height is a real choice between classic 30 to 32 inches and comfort 34 to 36 inches, and it should be made on purpose.

Then check the dimension that no catalog prints: the clear floor in front, the side clearance, and whether the drawers clear the plumbing. A vanity that fits the wall and blocks the room is still the wrong vanity.

Examples: 36 inches for a single basin, 60 inches for a double
21 inches deep is standard, and depth costs circulation
Choose classic or comfort height deliberately
Allow 21 inches in front where the 2021 IRC applies; 30 inches for comfort
Resolve drawers against plumbing on a drawing, before production

What kind of statement is each of these? Worth separating, because they carry different weight:

Industry convention — the standard widths and depths, and classic versus comfort height. Widely used, but no one is obliged to follow them, and they vary by region.
Regulated, in some markets — the accessible rim height and the clear floor space in front of the fixture. These are cited above with their sources and their scope. They bind only where that code is adopted.
Confirmed for WNS production — we build to the drawing you approve, in the sizes we quote for your project. We do not publish a fixed size range on this page, because the honest answer depends on the model and the market.
Needs order-by-order confirmation — the exact cabinet, counter and finished installed heights for a specific model; whether the drawers clear the plumbing positions on your wall; and the accessibility standard that applies at your destination.

Specifying vanities for a project?

Talk to WNS Global

Send the room dimensions, the service positions and the quantities. We will come back with dimensioned drawings for the sizes that suit, in inches or millimeters, and flag anything in the layout that will cause an installation problem before it reaches production.