Kitchen Cabinet Sizes: Complete Guide to Standard Dimensions (2026 Charts)
Standard kitchen cabinets come in three main types: base cabinets (34.5" tall × 24" deep, widths 9"–42"), wall cabinets (12"–42" tall × 12" deep, widths 9"–42"), and tall cabinets (84"–96" tall × 24" deep). Widths increase in 3-inch increments across the industry, and gaps are closed with filler strips. Below are the complete dimension charts for every cabinet type, plus how to read cabinet size codes like B36 or W3030.
How do cabinet size codes work?
Nearly every RTA cabinet uses a letter-and-number code. The letters tell you the cabinet type, and the numbers tell you the dimensions in inches:
- B36 = Base cabinet, 36" wide (height and depth are standard: 34.5" × 24")
- W3030 = Wall cabinet, 30" wide × 30" tall (12" deep standard)
- DB33 = Drawer Base, 33" wide
- SB36 = Sink Base, 36" wide
- UP2484 = Utility Pantry, 24" wide × 84" tall
Once you know the code system, you can read any cabinet spec at a glance.
What are standard base cabinet dimensions?
Base cabinets sit on the floor and support your countertop. Every standard base cabinet is 34.5" tall and 24" deep — adding a standard 1.5" countertop brings the finished work surface to 36".
| Base Cabinet Type | Widths Available | Height | Depth | Typical Use |
|---|---|---|---|---|
| Standard Base (door + drawer) | 12"–42" | 34.5" | 24" | General storage |
| Full-Height Door Base | 9"–33" | 34.5" | 24" | Trays, tall pots |
| Drawer Base (3-drawer) | 12"–36" | 34.5" | 24" | Cookware, utensils |
| Sink Base | 24"–42" | 34.5" | 24" | Under-sink |
| Farmhouse Sink Base | 36" | 34.5" | 24" | Apron-front sinks |
| Corner Base (Lazy Susan) | 33"–45" | 34.5" | 24"–36" | Corner storage |
| Trash Pull-Out Base | 18" | 34.5" | 24" | Waste bins |
| Microwave Base | 27" | 34.5" | 24" | Built-in microwave |
Example: the DB33 three-drawer base measures 33"W × 34.5"H × 24"D and is one of the most searched-for drawer base sizes.
What are standard wall cabinet dimensions?
Wall cabinets mount above the countertop, typically leaving an 18" backsplash gap. Standard depth is 12", with 24"-deep versions above refrigerators.
| Wall Cabinet Type | Widths | Heights | Depth | Typical Use |
|---|---|---|---|---|
| Standard Wall | 9"–42" | 30", 36", 42" | 12" | Dishes, dry goods |
| Bridge Cabinet | 12"–39" | 12"–24" | 12" or 24" | Above range, fridge, sink |
| Corner Wall | 24"–27" | 30", 36", 42" | 12" | Corner runs |
| Glass Door Wall | 12"–36" | 30", 36", 42" | 12" | Display storage |
| Microwave Wall | 27" | 30", 36", 42" | 12" | Microwave shelf |
Which wall cabinet height should you choose? 30" cabinets suit 8-foot ceilings with crown molding space; 36" maximizes storage under 8-foot ceilings; 42" runs to the ceiling in 9-foot rooms.
What are standard tall cabinet dimensions?
| Tall Cabinet Type | Widths | Heights | Depth |
|---|---|---|---|
| Utility Pantry | 18"–36" | 84", 90", 96" | 24" |
| Oven Cabinet | 31.5" | 84", 90", 96" | 24" |
Match tall cabinet height to your wall cabinet line: 84" pairs with 30" walls, 90" with 36", and 96" with 42".
What are standard bathroom vanity cabinet dimensions?
Vanity cabinets are shallower than kitchen bases — 21" deep instead of 24" — at the same 34.5" height.
| Vanity Type | Widths | Height | Depth |
|---|---|---|---|
| Vanity Sink Base | 24"–36" | 34.5" | 21" |
| Vanity Drawer Base | 12"–36" | 34.5" | 21" |
| Sink/Drawer Combo | 30"–60" | 34.5" | 21" |
How do you fill gaps between cabinets and walls?
Because cabinets come in 3" width increments, almost every kitchen needs filler strips (3"–6" wide) scribed to the wall. Plan 1.5"–3" of filler at each wall and at corners so doors and drawers clear adjacent cabinets.
FAQ
What is the standard height of kitchen base cabinets?
34.5 inches. With a standard 1.5" countertop, the finished height is 36 inches.
How deep are kitchen wall cabinets?
12 inches deep for standard wall cabinets. Bridge cabinets above refrigerators are available 24" deep to sit flush with the fridge.
What does DB33 mean?
Drawer Base, 33 inches wide — a three-drawer base cabinet measuring 33"W × 34.5"H × 24"D.
Do all brands use the same cabinet sizes?
Widths, heights, and depths are industry-standard across nearly all American framed cabinet lines, which is why cabinets from a quality RTA supplier fit the same layouts as big-box brands.
Ready to plan your layout? Measure your kitchen, then get a free 3D kitchen design with an exact cabinet list and quote.