How Deep Is a Wardrobe? Optimal Dimensions for Hanging Rails & Runners

April 6, 2026

The standard depth for a wardrobe with a lengthwise hanging rail is 600 mm, whereas for shallower depths from 350 mm downwards, pull-out wardrobe rails or transverse clothes hangers are used.

Planning a cabinet carcase requires precise technical planning regarding furniture fittings. The external wardrobe depth directly dictates the usable internal dimension and restricts the selection of compatible furniture hardware. For joiners and fitters, it is essential to match the exact installation dimensions of hinges, drawer runners, and hanging rails to the carcase depth to avoid internal collisions. This guide defines the technical requirements for hardware based on wardrobe depth and provides concrete parameters for installation.

The Most Important Planning Dimensions: Wardrobe Depth and Hardware Compatibility

The nominal dimension of a wardrobe generally refers to the outer edges. To determine the clear internal depth for fitting hardware, the material thicknesses of the front (usually 16 mm to 19 mm) and the back panel construction must be deducted. A grooved back panel made of 3 mm to 8 mm thick MDF or chipboard often takes up 15 mm to 20 mm of depth, including the groove lip.

A carcase with an external dimension of 600 mm therefore offers a clear internal depth of around 560 mm. This measurement is the industry standard, as a regular clothes hanger on a round or oval hanging rail requires a depth of 530 mm to 550 mm to hang without brushing against the closed door.

If the project deviates from this standard, the hardware requirements change fundamentally. If you plan, for example, a wardrobe 50 cm deep, regularly hung garments will strike the front. The same applies to a wardrobe 45 cm deep or an even shallower wardrobe 40 cm deep. Here, the storage direction must be rotated by 90 degrees using suitable fittings.

Choosing Hanging Rails and Runners by Wardrobe Depth

The choice of wardrobe storage fittings and drawer runners depends strictly on the determined clear internal depth.

Lengthwise Rails vs. Pull-Out Transverse Rails

From a clear internal depth of 550 mm, classic wardrobe tube (frequently in a 30 x 15 mm profile) is mounted into wardrobe rail brackets. These brackets are usually secured to the side panel using wood screws (drive PZ or TX, Ø 3.5 mm or 4 mm) or inserted into the 5 mm drill holes of the hole pattern.

If the internal depth is less than 500 mm, a pull-out transverse rail is strictly necessary. This fitting is screwed underneath the top panel or a fixed shelf. The clothes hangers hang behind one another. To access the garments at the back, the rail is pulled forward along an integrated runner.

Drawer Runners Inside the Wardrobe Carcase

If internal drawers are to be installed, the depth defines the nominal length of the runner. Common lengths for an undermount runner or side-mounted ball-bearing runner are stepped in 50 mm increments (e.g. 350 mm, 400 mm, 450 mm, 500 mm). The nominal length of the runner must always be at least 10 mm shorter than the clear internal depth of the carcase.

A full-extension drawer runner provides complete access to the drawer contents, as the drawer can be pulled out 100%. A partial-extension runner only exposes around 75% of the depth, making access to the rear area harder in deep wardrobes.

Types of Runners for Wardrobes at a Glance

In addition to installation length, runner load capacity is a critical factor. Drawers for heavy winter clothes or bed linen require different specifications than shallow drawers for ties or jewellery.

Ball-bearing runner: These side-mounted telescopic runners are extremely robust and offer high load ratings. Standard models carry 30 kg to 45 kg. They usually require exactly 12.7 mm of side installation clearance between the carcase side and the drawer box.
Undermount runner: Mounted concealed beneath the drawer base, providing a clean appearance with no runner visible when the drawer is open. Load capacity is typically 25 kg to 30 kg.
Roller runner: A simple, usually epoxy-coated runner with plastic rollers. It is forgiving during installation, but provides a less smooth action and is mostly designed as a partial-extension runner.

For a modern tactile experience, these systems are often equipped with motion mechanisms. Important for planning: Soft-Close (a hydraulic or pneumatic damper that gently closes the drawer) and Push-to-Open (a spring-loaded ejector for handleless fronts) are entirely opposing mechanisms. They require different front-gap tolerances during front alignment.

Decision Guide: Which Fitting for Which Depth?

Matching carcase volume to hardware choice can be structured around concrete application cases:

When the carcase depth is ≥ 600 mm:

This is the dimension of choice for a full-sized wardrobe for 2 persons. Here you use standard hanging rails and 500 mm or 550 mm full-extension runners for maximum storage capacity.

When the carcase depth is 450 mm - 500 mm:

The critical intermediate size. Use pull-out transverse rails for shirts and jackets. For drawers, choose runners with a 400 mm or 450 mm nominal length. Matching wardrobe accessories such as tie racks can still be installed comfortably on the side panels here.

When the carcase depth is 300 mm - 400 mm:

Such dimensions are often found in hallway furniture. A shoe cabinet depth 30 cm mostly uses specialised plastic shoe flap fittings. A chest of drawers depth 30 cm requires very short runners (nominal length 250 mm).

Installation Notes: Fitting in System 32 and Hinge Collisions

Professional installation of furniture fittings is based almost exclusively on System 32. This grid defines a continuous hole spacing of 32 mm and a standardised distance of 37 mm from the front row of holes to the front edge of the carcase. The drilling diameter for shelf supports and Euro screws is exactly 5 mm.

Planning internal pull-outs without considering hinge intrusion is like tailoring a suit without seam allowance – it will inevitably bind. When planning internal drawers behind a hinged door, you must calculate the concealed cup hinge precisely.

A standard hinge with an opening angle of 110° and a 35 mm cup diameter protrudes into the clear internal width of the carcase when open. If you now pull out the internal drawer, the drawer side will collide with the hinge arm or the edge of the open door. The technical solution for this is twofold:

Wide-angle hinges: Using hinges with an opening angle of 155° or 165° (with full overlay). These swing the door completely clear of the internal carcase width (zero protrusion).
Spacer strips: If a wide-angle hinge is not possible (for instance with an inset door or lack of clearance next to the wardrobe), the drawer runners must be packed out with spacers (usually 25 mm thick). The internal drawer is constructed correspondingly narrower as a result.

Frequently Asked Questions (FAQ)

How deep must a wardrobe be for standard clothes hangers? To prevent garments on hangers from rubbing against the back panel or the front, a clear internal depth of at least 530 mm, ideally 550 mm, is required. Adding the back panel and front gives an external dimension of approx. 600 mm.

Which hanging rail is suitable for 40 cm deep wardrobes? With a depth of 400 mm, lengthwise hanging is not possible. Here, an extendable pull-out transverse rail must be fitted. Garments hang parallel to the back panel and are pulled forward out of the carcase for removal.

How much depth clearance do internal drawers require? The required installation depth corresponds to the nominal length of the runner plus a tolerance of at least 5 mm to 10 mm to the back panel. For a runner with a 450 mm nominal length, the clear internal depth of the carcase must therefore be at least 460 mm.

What is the difference between Soft-Close and Push-to-Open on runners? Soft-Close is a damping system that catches the momentum of the closing drawer and pulls it shut silently over the last few centimetres. Push-to-Open (or Tip-On) is an ejection mechanism for handleless fronts; pressing the front releases a spring that pushes the drawer open slightly. Both systems are mutually exclusive in their basic mechanical form, unless sophisticated hybrid mechanisms are used.

Which concealed hinge should I use when internal drawers are fitted? To prevent the drawer from hitting the open door when pulled out, a wide-angle hinge with a 155° or 165° opening angle should be used. This hinge clears the entire internal aperture of the cabinet.