Understanding USM Haller Dimensions: The Complete Grid System Guide

The USM Haller modular furniture system is built on a precise, mathematical grid that has remained unchanged since 1963. Understanding these dimensions is crucial whether you're planning a new purchase, expanding an existing setup, or seeking compatible alternatives like Klackjoy.

The Magic Numbers: 750 x 350 x 350

The entire USM system is based on a 3:7 ratio grid:

| Dimension | Measurement | Purpose | |-----------|-------------|---------| | Width | 750mm | Standard horizontal module | | Height | 350mm | Standard vertical module | | Depth | 350mm | Standard depth |

This elegant system allows infinite combinations while maintaining visual harmony.

Why These Specific Dimensions?

Fritz Haller didn't choose these numbers randomly:

Human Scale

350mm is approximately the height of a seated person's elbow
750mm accommodates standard A4/Letter paper widths
The system naturally fits human ergonomics

Mathematical Harmony

750 = 350 × 2 + 50 (accounting for ball connectors)
All dimensions share common factors
Creates visually balanced proportions

Standard Panel Sizes

Horizontal Panels (Shelves, Tops)

| Size | Application | |------|-------------| | 750mm × 350mm | Single-width standard | | 750mm × 500mm | Single-width extended depth | | 500mm × 350mm | Compact option | | 500mm × 500mm | Square format |

Vertical Panels (Sides, Backs)

| Size | Application | |------|-------------| | 350mm × 350mm | Single-height module | | 500mm × 350mm | Extended-height module | | 350mm × 750mm | Standard side panel |

Tube Lengths

Tubes connect ball connectors and define the structural grid:

| Length | Common Use | |--------|------------| | 350mm | Standard height/depth | | 500mm | Extended height | | 750mm | Standard width |

Pro Tip: Ball Connector Offset

When calculating total dimensions, remember that ball connectors add approximately 35mm to each connection point.

Calculation Formula:

Total Width = (Number of columns × 750mm) + ((columns + 1) × 35mm)

For a 2-column unit:

Total = (2 × 750) + (3 × 35) = 1500 + 105 = 1605mm

Compatibility with Klackjoy

Klackjoy uses identical dimensions to USM Haller:

✅ Same 750 × 350 × 350mm grid
✅ Same tube diameters (35mm)
✅ Same ball connector threading
✅ 100% component interchangeability

This means you can:

Extend existing USM furniture with Klackjoy
Replace damaged USM parts with Klackjoy equivalents
Mix and match freely between systems

Space Planning Tips

Living Room Sideboards

2 × 1 grid (1605mm × 390mm): Perfect TV stand
3 × 2 grid (2355mm × 740mm): Statement sideboard

Home Office

2 × 3 grid (1605mm × 1090mm): Compact storage
3 × 4 grid (2355mm × 1440mm): Full wall unit

Entryway

1 × 2 grid (855mm × 740mm): Narrow console
2 × 2 grid (1605mm × 740mm): Standard console

Measuring Your Space

Before ordering, measure:

Available wall space (width × height)
Clearance depth (especially for traffic areas)
Ceiling height (for tall units)
Door/window positions

Leave at least 50mm clearance on each side for visual breathing room.

Ready to plan your configuration? Use our 3D Configurator to visualize exact dimensions in your space.