If you have ever stood in a kitchen showroom trying to figure out why your sink base needs to be 36 inches but your microwave cabinet only comes in 30, you have run headfirst into the world of standard cabinet sizes. The good news is that the cabinet industry standardized dimensions decades ago, so a base cabinet from KraftMaid will fit a slot designed for one from IKEA, Wellborn, or Medallion. The math becomes critical when you are designing a new kitchen, retrofitting an older one, or trying to fit a 30-inch range between two existing cabinets. Here is the complete dimensional reference for base cabinets, wall cabinets, tall cabinets, and the specialty units that fill in the gaps.
Part of our Kitchen Remodeling guide — explore the full guide →
Base Cabinet Standard Sizes
Base cabinets sit on the floor and support the countertop. Standard dimensions across the industry:
- Height: 34.5 inches (becomes 36 inches with a 1.5-inch countertop)
- Depth: 24 inches (with 25-26 inches typical countertop overhang)
- Toe kick: 4.5 inches tall, 3 inches deep
Standard base widths increment in 3-inch jumps from 9 to 48 inches:
- 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 48 inches
The most commonly stocked base widths at IKEA, Lowe’s, and Home Depot are 12, 18, 24, 30, and 36 inches. Sink bases typically come in 30, 33, or 36 inches to accommodate undermount sinks.
Wall Cabinet Standard Sizes
Wall cabinets mount above counters and storage zones. Standard depths and heights:
- Depth: 12 inches standard (15 inches available for deeper storage)
- Heights: 12, 15, 18, 24, 30, 36, 42 inches
- Widths: Same 9 to 48 inch range as base cabinets
The most popular wall cabinet height is 30 inches in 8-foot ceiling kitchens, leaving an 18-inch gap above the counter and a 6-inch gap to the ceiling for crown molding or soffit. For 9-foot or 10-foot ceilings, 36-inch or 42-inch wall cabinets extend to or near the ceiling for a high-end built-in look.
Tall Cabinet Standard Sizes
Tall cabinets house pantries, ovens, and broom storage. Standard heights:
- 84 inches (matches 30-inch wall cabinet on 8-foot ceilings)
- 90 inches (matches 36-inch wall cabinet)
- 96 inches (matches 42-inch wall cabinet)
Tall cabinet widths typically run 18, 24, 30, 33, or 36 inches. Pantry cabinets at 24 inches deep match base cabinet depth for a built-in look. Specialty 12-inch deep tall cabinets work well as pull-out spice or broom storage in narrow runs.
Specialty Cabinet Dimensions
Beyond the standard sizes, several specialty units fill specific gaps:
- Sink base: 30, 33, 36, or 42 inches wide. Special construction without a center stile to fit the sink basin.
- Corner base (lazy susan): 33, 36, or 42 inches per side. Holds a rotating shelf system.
- Blind corner base: 36, 39, 42, or 48 inches with a recessed corner. One side is “blind” — accessible only by reaching deep.
- Microwave wall cabinet: 30 inches wide, 18 inches tall, with reinforced shelf rated for 50-70 lbs.
- Refrigerator wall cabinet: 30, 33, or 36 inches wide, 12-18 inches tall, 24 inches deep to align with the fridge front.
- Range hood cabinet: 30, 33, or 36 inches wide, depth varies based on hood specifications.
- Wine and beverage cabinets: 15, 18, 24 inches wide with built-in racks or bottle storage.
IKEA Cabinet Sizes (SEKTION System)
IKEA’s SEKTION system uses metric dimensions that don’t always match traditional US sizes:
- Base widths: 12, 15, 18, 21, 24, 30, 33, 36, 38, 47 inches
- Base heights: 30 inches (standard) or 15 inches (drawer base)
- Base depths: 15 or 24 inches
- Wall heights: 15, 20, 30, 40 inches
- Wall depths: 15 inches standard
- Tall cabinet heights: 80 or 90 inches
SEKTION cabinets ship flat-pack and require assembly. Pricing is roughly 30-50% lower than equivalent semi-custom cabinets from KraftMaid or Medallion, but cabinet box quality is correspondingly lighter (5/8-inch melamine particleboard rather than 3/4-inch plywood).
Bathroom Vanity Cabinet Sizes
Bathroom vanities follow a different size convention:
- Standard heights: 32 inches (older standard) or 36 inches (“comfort height,” now most common)
- Depths: 18 or 21 inches (compared to 24-inch kitchen base cabinets)
- Widths: 18, 24, 30, 36, 42, 48, 60, 72 inches (60-inch and 72-inch are typical for double sinks)
Comfort-height vanities (36 inches) match the height of kitchen base cabinets and are easier on the back for adults. Powder rooms and children’s bathrooms still benefit from 32-inch standard height.
Cabinet Sizes for Common Appliances
Match cabinet sizes to standard appliance dimensions:
- 30-inch range: Needs a 30-inch wide opening between cabinets
- 36-inch range: Needs a 36-inch wide opening
- 30-inch range hood: Cabinet above must be 30 inches wide minimum
- 24-inch dishwasher: Needs a 24-inch opening between base cabinets
- 36-inch refrigerator: Needs 36-inch wide cutout, with depth and tall cabinet above
- Standard built-in microwave: 30-inch wide cabinet with reinforced floor
- Wall oven (single 30-inch): 30 or 33-inch wide tall cabinet
- Double wall oven: 30 or 33-inch wide tall cabinet, 90+ inches tall
Filler Strips and Awkward Spaces
Cabinet sizes rarely fit a kitchen wall perfectly. Filler strips bridge the gap between cabinets and walls or appliances. Common widths:
- 3-inch fillers for snug spots near walls or refrigerators
- 6-inch fillers for larger gaps or pull-out spice racks
- 9-inch fillers for full pull-out filler cabinets
Plan for at least 1.5 inches of filler on each side of a refrigerator and 3 inches between cabinet doors and walls so doors can swing open without binding on adjacent surfaces.
Custom Cabinet Sizes
If standard cabinet sizes won’t work, custom cabinets are an option:
- Width in 1-inch increments instead of 3-inch standard jumps
- Custom heights for tall ceilings or specialty applications
- Custom depths for shallow walls or oversized pantries
- Inset construction with specific reveal dimensions
Custom cabinets typically cost 50-100% more than semi-custom and require 8-12 weeks lead time. Local cabinet shops generally beat national custom brands on price for the same spec.
Quick Reference for Planning
Memorize these key cabinet sizes for any kitchen layout:
- Base cabinets: 34.5 inches tall, 24 inches deep, 9-48 inches wide in 3-inch increments
- Wall cabinets: 12-42 inches tall, 12 inches deep, same width range
- Tall cabinets: 84, 90, or 96 inches tall
- Counter height: 36 inches standard (34.5-inch cabinet + 1.5-inch counter)
- Bar/breakfast counter: 42 inches tall
- Toe kick: 4.5 inches tall, 3 inches deep
- Backsplash height: 18 inches between counter and wall cabinet
Knowing these dimensions cold makes kitchen planning straightforward — and helps you spot when a designer or contractor proposes something nonstandard that may cost more or limit future appliance choices.
