Buying a bathroom cabinet without knowing the standard sizes is how remodels go sideways — a vanity that’s a half-inch too deep can block a door, and a medicine cabinet mounted too high leaves half your household staring at the ceiling in the mirror. This guide breaks down real, current sizing for vanities, medicine cabinets, and linen cabinets, so you can measure your own space with confidence before you buy anything.
Whether you’re replacing a single vanity, planning a full remodel, or just double-checking a cabinet you’re about to order, you’ll find a complete size chart, a step-by-step measuring process, real room examples, and a free printable worksheet to take with you to the store. Our vanity mirror ideas has more inspiration along these same lines.
Bathroom Cabinet Size Chart
| Cabinet Type | Standard Width | Standard Height | Standard Depth | Best For |
|---|---|---|---|---|
| Single-Sink Vanity | 24–36 in | 30–36 in (32 in standard, 34.5–36 in comfort height) | 18–21 in | Powder rooms, small to medium bathrooms |
| Double-Sink Vanity | 60–72 in (48 in absolute minimum) | 34.5–36 in comfort height | 21 in | Primary baths, shared family bathrooms |
| Medicine Cabinet (Recessed) | 14–30 in | 20–30 in | 3.5–4 in | Open wall studs, flush built-in look |
| Medicine Cabinet (Surface-Mount) | 16–36 in | 24–30 in | 4–6 in | Renters, retrofits, extra shelf depth |
| Linen / Wall Cabinet | 18–30 in | 30–84 in (tall units) | 12–16 in | Towel and toiletry storage in tight layouts |
How the Numbers Translate to Your Wall
A size chart only helps once you can picture it on your actual wall. Width is the dimension most people get right and depth is the one that trips people up, since it’s easy to eyeball a cabinet as “about right” without accounting for door swing or a countertop overhang that typically adds about an inch past the cabinet box on each side.
Height works a little differently depending on the cabinet. Vanity height is measured floor-to-cabinet-top, while medicine cabinet height is really about where the mirror’s center lands relative to the people using it — 60 to 65 inches above the floor keeps it at eye level for most adults. Linen cabinets are the outlier: because they’re floor-to-near-ceiling storage rather than a work surface, their “standard” height range is much wider and depends entirely on your ceiling height and how much vertical storage you want. Our guide on how to clean bathroom walls walks through this step by step.
Designer tip: Before ordering anything, tape the vanity’s footprint directly onto the floor and mark the medicine cabinet’s outline on the wall at its intended mounting height. Standing in the space for even thirty seconds catches clearance problems that measurements on paper miss.
How to Measure Your Bathroom for New Cabinets
- Gather your tools. A steel tape measure, painter’s tape, a pencil, and a notepad or your phone’s notes app are all you need. Skip a fabric or cloth tape — it stretches and throws off small measurements that matter for cabinet fit.
- Measure the full wall width. Measure wall-to-wall at counter height, not just at the floor, since baseboards, outlets, or a window trim can narrow the usable width partway up.
- Check available depth. Measure from the back wall to any obstruction — a door swing, a toilet, a tub edge — and subtract at least 21 inches for comfortable clearance in front of the finished cabinet. See our toilet room ideas for more direction in this style.
- Note plumbing and outlet locations. Mark the centerline of your existing drain and supply lines. Moving plumbing adds real cost, so most remodels are built around where those lines already sit.
- Mark mounting heights on the wall. Use painter’s tape to outline where the vanity top, medicine cabinet bottom, and medicine cabinet top will land, then step back and look at the whole wall together.
- Double-check the doorway. Measure your bathroom door width and any hallway turns the new cabinet has to travel through — a vanity that fits the wall perfectly is no good if it can’t get through the door.
The most common mistake at this stage isn’t a wrong measurement — it’s forgetting to re-measure after swapping one dimension. Widening a vanity by six inches to fit a nicer sink often eats into the clearance you were counting on in front of it, so treat width, depth, and clearance as one connected decision rather than three separate ones.
Real Room Examples
Small Powder Room (Under 40 sq ft)
A 24 to 30-inch single-sink vanity at 18 to 21 inches deep keeps the floor open. Pair it with a 16 to 20-inch recessed medicine cabinet rather than a bulky surface-mount unit to avoid the room feeling boxed in.
Medium Family Bathroom (40–100 sq ft)
36 to 48 inches of vanity width gives one generous sink with real counter space on both sides, or a compact double-sink layout if two people need the room at once. A 24-inch medicine cabinet centered above the sink and a shallow 12-inch linen cabinet along a side wall round out the storage.
Large Primary Bathroom (100+ sq ft)
60 to 72-inch double-sink vanities make sense here, each sink getting its own 30-inch medicine cabinet rather than one long shared cabinet. A tall 24 to 30-inch linen cabinet becomes practical at this size without crowding the layout.
Apartment Bathroom
Depth is usually the real constraint in rental layouts, not width. An 18-inch-deep vanity and a surface-mount medicine cabinet (no wall cutting required) are the easiest combination to install without touching the existing wall structure.
Guest / Secondary Bathroom
Standard height (30–32 inches) rather than comfort height is worth considering here if the bathroom sees frequent use by kids or shorter guests. A 30-inch vanity with a 20 to 24-inch medicine cabinet is a comfortable, low-cost standard pairing.
Professional Tips for Getting Bathroom Cabinet Sizing Right
Designer pick: Keep the medicine cabinet a few inches narrower than the vanity beneath it — centered and slightly smaller reads as intentional, while a cabinet wider than the sink below it looks like an afterthought.
Space-saving trick: A shallow 16 to 18-inch vanity paired with a deeper 6-inch surface-mount medicine cabinet often nets more usable storage than the reverse, without adding any floor footprint.
Luxury upgrade: In a primary bath with 72 inches or more of wall width, two separate 30 to 36-inch vanities with a small gap between them reads more custom than one continuous double-sink unit.
Budget-friendly swap: A stock 30 or 36-inch vanity with a surface-mount medicine cabinet avoids the cost of cutting into a wall for a recessed unit, and both are widely available off the shelf.
Common mistake to avoid: Ordering a vanity based on the room’s total width without subtracting door swing, a nearby toilet, or a radiator. The wall might be 40 inches wide, but the usable footprint is often several inches narrower.
Free Printable: Bathroom Cabinet Size Worksheet
Take the guesswork out of your next cabinet purchase. This free printable includes a compact version of the size chart above plus a fill-in-the-blank measurement worksheet for your wall width, depth, plumbing centerline, and mounting heights — print it and bring it with you to the store or your contractor walkthrough.
Download the Free Printable Bathroom Cabinet Size ChartFrequently Asked Questions
What is the standard bathroom vanity size?
Standard bathroom vanities run 24 to 72 inches wide, 18 to 21 inches deep, and 30 to 36 inches tall. A 30-inch-wide, 21-inch-deep vanity is the most common size for a single-sink bathroom.
What is the standard height for a bathroom vanity?
The traditional standard height is 30 to 32 inches, measured from the floor to the top of the cabinet. Most vanities sold today are built to comfort height instead, at 34.5 inches for the cabinet, or 36 inches once a countertop is added.
What is comfort height for a vanity?
Comfort height matches standard kitchen counter height at 36 inches finished. It reduces bending for most adults and has become the current standard in new construction and remodels, though standard height (30 to 32 inches) still suits households with young children.
How deep should a bathroom vanity be?
21 inches is the most common cabinet depth, giving enough counter space for a standard sink. Shallow 18-inch cabinets work in tight bathrooms, and 16-inch depths exist for very compact powder rooms, though storage space shrinks accordingly.
What size vanity do I need for a small bathroom?
For a powder room or bathroom under about 40 square feet, a 24 to 36-inch-wide vanity keeps the floor open while still providing a usable sink and some storage. Go with an 18-inch depth if the room is especially tight.
What is the minimum width for a double-sink vanity?
48 inches is the absolute floor for two sinks, but it will feel cramped. 60 inches is the comfortable standard, and 72 inches or wider gives each sink its own generous counter space.
What is the standard medicine cabinet size?
Most medicine cabinets range from 14 to 36 inches wide and 20 to 30 inches tall. A 20 to 24-inch-wide, 24 to 30-inch-tall cabinet is the most common choice above a standard single-sink vanity.
How high should a medicine cabinet be mounted?
Center the mirror around 60 to 65 inches above the finished floor, which lines up with eye level for most adults. The bottom edge is typically set about 12 to 18 inches above the countertop.
Should a medicine cabinet be wider than the vanity?
No. A medicine cabinet should generally be equal to or narrower than the vanity below it, ideally around 70 to 90 percent of the vanity’s width, so the cabinet reads as centered and proportionate rather than overhanging the counter.
What’s the difference between recessed and surface-mount medicine cabinets?
Recessed cabinets sit inside the wall cavity for a flush, built-in look but need roughly 3.5 to 4 inches of depth behind the drywall. Surface-mount cabinets attach directly to the wall face, need no wall cavity, and typically run 4 to 6 inches deep.
How deep is a recessed medicine cabinet?
Recessed medicine cabinets are typically 3.5 to 4 inches deep, sized to fit inside a standard 2×4 wall cavity. Always confirm the exact cutout depth against your wall framing before purchasing.
What size linen cabinet fits in a small bathroom?
An 18 to 24-inch-wide linen or wall cabinet with a shallow 12 to 16-inch depth fits most small bathrooms without crowding the floor plan, while still holding towels and toiletries.
How much clearance do I need in front of a vanity?
Leave at least 21 inches of open floor space in front of any vanity or cabinet for comfortable movement. 30 inches or more is a more comfortable target if the layout allows it.
Can I put a 24-inch vanity in a powder room?
Yes. A 24-inch vanity is one of the smallest standard widths and works well in a powder room or very compact bathroom, though it limits both counter space and storage compared to a 30 or 36-inch model.
What’s the difference between a bathroom vanity and a kitchen base cabinet size?
A kitchen base cabinet is typically 24 inches deep, while a bathroom vanity is 21 inches deep. The two aren’t interchangeable, since plumbing rough-ins, countertop overhang, and door clearance are all sized around the shallower vanity depth.
How do I measure my bathroom for a new vanity?
Measure the full wall width, the depth available before any door swing or fixture interferes, and the height to any window, outlet, or light fixture above. Also confirm at least 21 inches of clearance will remain in front once the new cabinet is installed.
What size vanity works for two sinks vs. one large sink?
A single large sink can work well in a 36 to 48-inch vanity and often keeps the counter feeling more open. Two sinks generally need at least 60 inches combined so each person has enough personal counter space around their bowl.
How much space should be on each side of a medicine cabinet?
Leave enough clearance on each side for light fixtures, sconces, or towel bars to operate without interference, generally a few inches minimum, and confirm the cabinet door can open fully without hitting a wall or fixture.
Do bathroom cabinet sizes follow ADA guidelines?
Standard retail cabinet sizes aren’t ADA cabinets by default, but ADA-compliant bathrooms require specific knee clearance, counter height (typically around 34 inches maximum), and approach space that go beyond typical comfort-height sizing, so accessible bathrooms usually need cabinets selected or modified specifically for that purpose.
What’s the most common mistake when buying a bathroom cabinet?
Measuring the wall space but forgetting to confirm floor clearance, door swing, and countertop overhang. A cabinet that technically fits the wall can still block a door or leave too little room to move comfortably in front of it.
Bottom line: get the depth and clearance right first — width is easy to eyeball, but a cabinet that’s too deep or too close to a door swing is the mistake that’s expensive to fix after installation. Measure twice, tape it out on the floor once, and the rest of the decision gets a lot easier.
