License Plate Sizes: Complete Guide by Country and State
License plates come in standardized sizes that vary by country, state, and vehicle type. Understanding these dimensions is essential for mounting brackets, replacement plates, and custom plate frames. This comprehensive guide covers license plate sizes across the United States, international standards, and specialty plate dimensions for 2026.
United States Standard License Plate Dimensions
The vast majority of US states use a standard license plate size established decades ago. However, some states have unique dimensions or mounting requirements.
| Plate Type | Width | Height | Mounting Holes | Used By |
|---|---|---|---|---|
| Standard US Plate | 12" (305 mm) | 6" (152 mm) | 7" apart (horizontal) | 49 states + DC |
| Motorcycle Plate | 7" (178 mm) | 4" (102 mm) | Varies by state | All states |
| Trailer Plate | 12" (305 mm) | 6" (152 mm) | Standard (7" apart) | Most states |
| Dealer Plate | 12" (305 mm) | 6" (152 mm) | Standard (7" apart) | All states |
US State-Specific Variations
While most US states conform to the 12" × 6" standard, some states have historically used different sizes or have unique mounting characteristics.
| State/Territory | Standard Size | Notes |
|---|---|---|
| Alabama - Wyoming | 12" × 6" | Standard 4-hole mounting (7" horizontal, 4.5" vertical) |
| Puerto Rico | 12" × 6" | Standard mounting, bilingual plates |
| US Virgin Islands | 12" × 6" | Standard mounting |
| Guam | 12" × 6" | Standard mounting |
| Washington DC | 12" × 6" | "Taxation Without Representation" slogan |
Mounting Hole Specifications
US standard license plates feature four mounting holes with these specifications:
- Horizontal spacing: 7 inches (177.8 mm) center-to-center
- Vertical spacing: 4.5 inches (114.3 mm) center-to-center
- Hole diameter: 0.25 inches (6.35 mm) or 7/32" slotted holes
- Edge clearance: Typically 0.5" from edges
International License Plate Sizes
License plate dimensions vary significantly worldwide, with different regions adopting their own standards.
European Union Standard Plates
| Country/Type | Dimensions (mm) | Dimensions (inches) | Notes |
|---|---|---|---|
| EU Standard (Single Row) | 520 × 110 mm | 20.5" × 4.3" | Most common, blue EU stripe on left |
| EU Standard (Two Row) | 340 × 200 mm | 13.4" × 7.9" | Used when single row doesn't fit |
| UK Standard (Post-Brexit) | 520 × 111 mm | 20.5" × 4.4" | Can have UK identifier or flag |
| UK Square Plate | 285 × 203 mm | 11.2" × 8.0" | For vehicles with limited space |
| Germany Standard | 520 × 110 mm | 20.5" × 4.3" | EU standard format |
| France Standard | 520 × 110 mm | 20.5" × 4.3" | SIV system since 2009 |
| Italy Standard | 520 × 110 mm | 20.5" × 4.3" | EU format |
| Spain Standard | 520 × 110 mm | 20.5" × 4.3" | EU format |
Asia-Pacific Region
| Country | Dimensions (mm) | Dimensions (inches) | Notes |
|---|---|---|---|
| Japan (Standard) | 330 × 165 mm | 13.0" × 6.5" | White plates (private), green/yellow (commercial) |
| Japan (Compact Cars) | 230 × 125 mm | 9.1" × 4.9" | Yellow plates for kei cars |
| Australia (Standard) | 372 × 134 mm | 14.6" × 5.3" | Varies slightly by state |
| Australia (Motorcycle) | 250 × 100 mm | 9.8" × 3.9" | Smaller format |
| New Zealand | 370 × 134 mm | 14.6" × 5.3" | Similar to Australian standard |
| China (Standard) | 440 × 140 mm | 17.3" × 5.5" | Blue plates (private), yellow (commercial) |
| India (Standard) | 500 × 120 mm | 19.7" × 4.7" | High security plates since 2019 |
| South Korea | 520 × 110 mm | 20.5" × 4.3" | Similar to EU standard |
Other Regions
| Country | Dimensions (mm) | Dimensions (inches) | Notes |
|---|---|---|---|
| Canada (Standard) | 305 × 152 mm | 12.0" × 6.0" | Same as US standard |
| Mexico (Standard) | 305 × 152 mm | 12.0" × 6.0" | Same as US standard |
| Brazil (Mercosur) | 400 × 130 mm | 15.7" × 5.1" | New Mercosur standard (2018+) |
| Argentina (Mercosur) | 400 × 130 mm | 15.7" × 5.1" | Mercosur format |
| South Africa | 520 × 114 mm | 20.5" × 4.5" | Close to EU standard |
| Saudi Arabia | 520 × 110 mm | 20.5" × 4.3" | Arabic and English text |
| UAE | 520 × 110 mm | 20.5" × 4.3" | Arabic and English text |
Motorcycle License Plates by Region
Motorcycle plates are typically smaller than standard automotive plates, but dimensions vary significantly by country.
| Region/Country | Dimensions | Notes |
|---|---|---|
| US (Most States) | 7" × 4" (178 × 102 mm) | Standard motorcycle plate |
| EU Standard | 220 × 200 mm (8.7" × 7.9") | Square format, effective 2026 |
| UK Motorcycle | 228 × 164 mm (9.0" × 6.5") | Standard size for motorcycles |
| Australia Motorcycle | 250 × 100 mm (9.8" × 3.9") | Horizontal format |
| Japan Motorcycle | 230 × 125 mm (9.1" × 4.9") | Same as kei car plates |
| Canada Motorcycle | 7" × 4" (178 × 102 mm) | Same as US standard |
Specialty and Custom License Plates
Various specialty plates exist for different vehicle types and purposes, though most adhere to standard dimensions.
US Specialty Plate Types
| Plate Type | Size | Purpose |
|---|---|---|
| Vanity/Personalized | 12" × 6" | Custom text, standard size |
| Collegiate/University | 12" × 6" | School logos, standard size |
| Military/Veterans | 12" × 6" | Service branch insignia |
| Disabled/Handicapped | 12" × 6" | Wheelchair symbol included |
| Antique/Classic Car | 12" × 6" | For vehicles 25+ years old (varies by state) |
| Environmental/Green | 12" × 6" | For hybrid/electric vehicles |
| Farm/Agricultural | 12" × 6" | For farm equipment and vehicles |
| Government/Official | 12" × 6" | For government-owned vehicles |
License Plate Frame Dimensions
License plate frames must accommodate the plate size plus mounting hardware. Here are standard frame sizes:
| Frame Type | Outer Dimensions | Plate Opening | Notes |
|---|---|---|---|
| US Standard Frame | 12.25" × 6.25" | 12" × 6" | 0.125" border all around |
| US Wide-Border Frame | 13" × 7" | 12" × 6" | 0.5" border (advertising space) |
| Motorcycle Frame | 7.25" × 4.25" | 7" × 4" | 0.125" border |
| EU Standard Frame | 540 × 130 mm | 520 × 110 mm | 10mm border |
| Slim-Line Frame | 12.125" × 6.125" | 12" × 6" | Minimal 0.0625" border |
License Plate Materials and Thickness
Beyond dimensions, license plate construction varies by material and thickness, affecting mounting requirements.
| Material Type | Typical Thickness | Weight | Durability |
|---|---|---|---|
| Aluminum (Standard US) | 0.025" - 0.032" (0.6 - 0.8 mm) | 3-4 oz | Excellent, rust-resistant |
| Steel (Older Plates) | 0.024" - 0.030" (0.6 - 0.76 mm) | 5-6 oz | Good, can rust |
| Acrylic (EU/Modern) | 1.5 - 3 mm | 2-3 oz | Good, UV-resistant |
| Plastic/Polymer | 2 - 4 mm | 2-4 oz | Fair to good, flexible |
Historical License Plate Sizes
License plate dimensions have evolved over time. Some historical variations include:
- Pre-1956 US plates: Varied significantly by state, no standard size
- 1956 Standardization: Most states adopted 12" × 6" format
- 1970s variations: Some states experimented with different formats
- Square plates: Used by some states in early 1900s (roughly 8" × 8")
- Narrow plates: Some states used 12" × 5" in the 1940s-50s
Mounting Considerations
Front vs. Rear Plate Requirements
In the United States, license plate requirements vary by state:
- Two-plate states (31 states + DC): Require both front and rear plates
- One-plate states (19 states): Require only rear plate
- States requiring only rear: Alabama, Arizona, Arkansas, Delaware, Florida, Georgia, Indiana, Kansas, Kentucky, Louisiana, Michigan, Mississippi, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, West Virginia
Mounting Hardware
| Hardware Type | Size/Specification | Use |
|---|---|---|
| Standard Screws | #14 × 3/4" sheet metal screws | Most common mounting |
| Security Screws | #14 × 3/4" one-way screws | Anti-theft, can only tighten |
| Bolts with Nuts | 1/4"-20 × 3/4" bolts | Through-hole mounting |
| Snap-in Clips | Proprietary sizes | Tool-free installation |
Digital and Electronic License Plates
Some jurisdictions are piloting digital license plates, which maintain traditional dimensions but use e-ink or LED displays.
| Type | Size | Availability (2026) |
|---|---|---|
| Reviver Digital Plate | 12" × 6" (US Standard) | CA, AZ, MI, TX (limited) |
| E-Ink Display Plate | 12" × 6" | Pilot programs in multiple states |
| EU Digital Plate | 520 × 110 mm | Under development |
License Plate Size Regulations
Visibility Requirements
Most jurisdictions have specific regulations about plate visibility and mounting:
- Height from ground: Typically 12" minimum, 60" maximum
- Horizontal positioning: Centered on vehicle width (usually)
- Lighting: Rear plate must be illuminated at night (white light)
- Obstruction: No frames, covers, or devices that obscure characters
- Tinting: Most states prohibit tinted or smoked plate covers
- Orientation: Must be mounted horizontally (not vertical)
Cover and Frame Restrictions
- Clear covers: Allowed in most states if not tinted
- Frame borders: Must not cover registration stickers or state name
- Reflectivity: Cannot reduce plate reflectivity below standards
- Advertising frames: Generally allowed if compliant with coverage rules
License plate dimensions
Rough opening vs. finished size
License plate dimensions in the US/Canada: 12″ W × 6″ H (since 1957). Mounting hole spacing: 7″ apart, centred. EU plates are 520 mm × 110 mm (front, rectangular) or 340 mm × 220 mm (rear, square format used in Italy, France).
Standard sizes by use
Most US states require front and rear plates; some (Florida, Texas, Arizona, etc.) only require rear. Bracket hole spacing on a vehicle matches the plate's 7″ spacing in North America. Custom and aftermarket frames must not obstruct any character or the state name.
Code and egress
Bedrooms must have an egress window or door (size, sill height, and operability vary by jurisdiction). For doors, check the rough opening, the door's swing direction, and the trim allowance before ordering.
Common mistakes
- Confusing nominal and rough-opening dimensions; they differ by 2–2.5″ for most pre-hung doors.
- Forgetting handle and lock side — this affects which way the unit must be ordered.
- Skipping the egress check on a bedroom remodel.