A standard Mini-ITX motherboard measures 170 × 170 mm, or approximately 6.7 × 6.7 inches. This square PCB footprint is the standard Mini-ITX size used for compact desktop, embedded, and industrial motherboard designs.

If you are comparing Mini-ITX dimensions, ITX sizes, or motherboard form factors, start with the 170 × 170 mm board outline. For actual products and platform options, see our Mini-ITX boards.

Mini-ITX Dimensions at a Glance

The standard Mini-ITX dimensions refer to the width and depth of the motherboard PCB. They do not describe the total height of a finished computer or enclosure.

Measurement	Specification
Board Width	170 mm
Board Depth	170 mm
Board Size	170 × 170 mm
Approx. Inches	6.7 × 6.7 in
Thin Mini-ITX	170 × 170 mm

Note: Dimensions refer to the motherboard PCB footprint.

Therefore, searches such as Mini-ITX size, ITX dimensions, Mini-ITX measurements, and Mini-ITX dimensions in mm normally refer to the same 170 × 170 mm motherboard footprint.

How Big Is a Mini-ITX Motherboard?

A Mini-ITX motherboard is 170 mm wide and 170 mm deep. In inches, that is approximately 6.7 inches by 6.7 inches.

The compact square format is considerably smaller than ATX and Micro-ATX while retaining enough board area for a processor, memory, storage, rear I/O, and a primary expansion interface.

The 170 × 170 mm measurement describes the motherboard itself. A complete Mini-ITX system will be larger because the enclosure must also accommodate cooling, storage, power, connectors, and any expansion hardware.

Mini-ITX Size Compared with Other Motherboard Sizes

Comparing motherboard dimensions makes the space advantage of Mini-ITX easier to understand.

Form Factor	Dimensions	Approx. Size in Inches
ATX	305 × 244 mm	12 × 9.6 in
Micro-ATX	244 × 244 mm	9.6 × 9.6 in
Mini-ITX	170 × 170 mm	6.7 × 6.7 in
Nano-ITX	120 × 120 mm	4.7 × 4.7 in
Pico-ITX	100 × 72 mm	3.9 × 2.8 in

Mini-ITX uses substantially less board area than Micro-ATX, which makes it suitable for compact systems where full-size motherboard expansion is unnecessary.

Mini-ITX vs Micro-ATX Dimensions

Micro-ATX measures 244 × 244 mm, while Mini-ITX measures 170 × 170 mm. Mini-ITX is therefore 74 mm shorter in both width and depth.

The smaller footprint can reduce enclosure size, but it also leaves less PCB area for expansion slots, connectors, and additional onboard devices. The right form factor depends on whether compact dimensions or expansion capacity is more important to the system.

Thin Mini-ITX Dimensions

Thin Mini-ITX also uses a 170 × 170 mm PCB footprint. It is not a smaller X-Y motherboard format than standard Mini-ITX.

The main distinction is vertical space. Thin Mini-ITX is intended for lower-profile systems, so component placement, cooling, memory, and connector height are more tightly controlled than on many conventional Mini-ITX designs.

Mini-ITX Footprint 170 × 170 mm Standard square PCB size

Thin Mini-ITX Footprint 170 × 170 mm Same X-Y board dimensions

Main Difference System Height Thin designs target lower-profile assemblies

Selection Focus Z-Axis Clearance Check component and cooling height

So when comparing Thin Mini-ITX dimensions with standard Mini-ITX dimensions, the board footprint remains the same. The important difference is the permitted system and component height.

What Is the Mini-ITX Hole Pattern?

The Mini-ITX hole pattern defines the motherboard mounting locations used to secure the PCB to compatible chassis standoffs. It is part of the mechanical form factor, but the basic 170 × 170 mm board measurement should not be used as a substitute for an exact mounting drawing.

If you are designing a chassis, rear panel, or custom enclosure, use the exact motherboard mechanical drawing rather than estimating mounting positions from the board edges.

170 × 170 mm defines the PCB footprint, not the mounting coordinates. Use the exact board mechanical drawing for standoff and chassis-hole placement.

For detailed information about mounting geometry, rear I/O openings, standoffs, I/O shield dimensions, and component clearances, see our Mini-ITX mechanical dimensions and design guide.

Does Every Mini-ITX Board Have the Same Dimensions?

Standard Mini-ITX motherboards share the nominal 170 × 170 mm PCB footprint, but that does not make every board identical.

Processor sockets, heatsinks, memory sockets, rear I/O, power inputs, storage connectors, and expansion interfaces can differ between models. These differences matter when choosing a finished enclosure even though the basic Mini-ITX board dimensions remain unchanged.

Rear I/O: Port combinations and connector positions vary.
Cooling: Heatsink and CPU-area height can differ.
Storage: M.2 and SATA locations are board-specific.
Power: Input type and connector placement may differ.
Expansion: PCIe and onboard expansion layouts are not identical.

For a simple size comparison, use 170 × 170 mm. For enclosure engineering, use the exact mechanical drawing for the board being installed.

When Is Mini-ITX Size a Good Choice?

Mini-ITX

Choose 170 × 170 mm

Best when compact size and standard PC-class functionality need to stay balanced.

Compact enclosure
Moderate expansion needs
Embedded or industrial system

Other Sizes

Consider Another Form Factor

Move larger or smaller when expansion capacity or enclosure size is the main constraint.

Micro-ATX for more expansion
Nano/Pico-ITX for tighter space
ATX for full-size systems

Rule of thumb: Mini-ITX is the middle ground between very small embedded boards and larger desktop form factors.

The Mini-ITX form factor is a good fit when a system needs more capability than very small embedded boards can provide but has less available space than a Micro-ATX or ATX platform.

Compact desktop and small-form-factor computers
Industrial and embedded computers
Network and edge computing appliances
Digital signage and control systems

The 170 × 170 mm footprint helps reduce board area while still supporting a broad range of processors, memory, storage, and I/O configurations.

Mini-ITX Size: What to Remember

Confirm Form Factor

Mini-ITX uses a 170 × 170 mm PCB footprint.

Compare Board Sizes

Check Mini-ITX against larger or smaller form factors.

Check Thin Mini-ITX

Use the same footprint when a lower-profile design is required.

Verify the Exact Board

Use the product mechanical drawing before final design.

The standard Mini-ITX size is 170 × 170 mm, or approximately 6.7 × 6.7 inches. Thin Mini-ITX uses the same PCB footprint, while Micro-ATX and ATX are substantially larger.

Use these dimensions for form-factor and board-space comparisons. For mounting or enclosure engineering, verify the exact motherboard mechanical documentation.

Mini-ITX Dimensions FAQ

What are the standard Mini-ITX dimensions?

A standard Mini-ITX motherboard measures 170 × 170 mm, or approximately 6.7 × 6.7 inches.

What are Mini-ITX dimensions in millimeters?

Mini-ITX dimensions are 170 mm wide by 170 mm deep. The resulting motherboard PCB footprint is 170 × 170 mm.

What are Mini-ITX dimensions in inches?

Mini-ITX measures approximately 6.7 inches wide by 6.7 inches deep.

Are Mini-ITX and Thin Mini-ITX the same size?

Yes. Both use a 170 × 170 mm PCB footprint. Thin Mini-ITX differs mainly in component-height and low-profile system requirements rather than board width or depth.

Is Mini-ITX smaller than Micro-ATX?

Yes. Mini-ITX measures 170 × 170 mm, while Micro-ATX measures 244 × 244 mm. Mini-ITX therefore requires substantially less motherboard area.

Do all Mini-ITX boards use the same hole pattern?

Mini-ITX follows standardized mounting conventions, but enclosure designers should verify mounting positions against the exact motherboard mechanical drawing before manufacturing a chassis or custom mounting plate.

Technology Never Stands Still, and Neither Do We

Mini-ITX Dimensions: 170 × 170 mm Size and Measurements

Mini-ITX Dimensions at a Glance