7 Inch U.S. License Plate Hole Spacing: Standards and Fixes

Standard passenger license plates measure 12 inches by 6 inches, with bolt holes spaced 7 inches apart center to center horizontally and roughly 4 3/4 inches vertically where both sets exist. The holes themselves are elongated, about 1/2 inch by 0.28 inch, not perfectly round. Motorcycle plates run smaller at 7 inches by 4 inches, with horizontal bolt spacing near 5 13/16 inches and round 5/16 inch holes. Knowing these numbers before you drill or buy a frame saves a mismatched plate and a wasted trip to the hardware store.

TL;DR:

• Most passenger plates measure 12 by 6 inches with 7 inch horizontal bolt spacing and elongated holes about 1/2 inch by 0.28 inch; motorcycle plates are smaller at 7 by 4 inches with roughly 5 13/16 inch spacing and circular holes.
• The standard dimensions and hole placements follow industry standards such as SAE J686 and the AAMVA License-Plate Standard to ensure compatibility across manufacturers and states.
• To avoid improper mounting, measure existing holes or the plate itself carefully, using center-to-center measurements, before drilling any holes or purchasing hardware.
• Fasteners typically require about 6 millimeter diameter bolts, with length depending on whether a frame is added, and stainless steel or coated bolts resist rust better in harsh conditions.
• When no factory holes exist, no-drill brackets or mounting options that clip onto existing vehicle features are recommended to avoid damaging the bumper or paint.

Table of Contents

• Where these numbers come from: SAE, AAMVA, and state DMV specs
• Why hole patterns vary across plate types
• How to measure hole spacing and prep for drilling
• Hardware and fastener specs for a secure mount
• Fitting options when there are no factory holes
• Fixing common fit problems without damaging your vehicle
• What actually matters when mounting a plate
• An accessory option worth knowing about
• FAQ
• Sources

Where these numbers come from: SAE, AAMVA, and state DMV specs

These dimensions aren’t arbitrary. The technical backbone is SAE J686, the industry standard that sets basic license plate dimensions and legibility requirements for manufacturers. States and platemakers build their own specs around it, which is why a plate from one state mounts the same way as one from another.

The AAMVA License-Plate Standard, Edition 3 (2025 update) refines that framework for the modern era of automated license plate readers. It calls for 12 inch by 6 inch plates with bolt holes placed 2.5 inches from the side borders and 0.5 inch from the top and bottom of the border, keeping hole placement consistent enough that plates and frames made by different manufacturers still line up.

A concrete example helps. The Texas Department of Motor Vehicles plate specification lists:

• Plate size: 12 inches wide by 6 inches tall
• Horizontal bolt hole spacing: 7 inches center to center
• Vertical bolt hole spacing: 4 3/4 inches
• Bolt hole shape and size: elongated, about 1/2 inch by 0.28 inch

Motorcycle plates follow a separate spec. They typically measure 7 inches by 4 inches with horizontal bolt spacing around 5 13/16 inches and circular 5/16 inch holes, according to the Texas DMV, smaller geometry built for a smaller mounting plate on a motorcycle’s tail. Specialty plates, like those for trailers or vanity graphics, can shift slightly from these baseline numbers, so always check the plate in hand rather than assume.

Why hole patterns vary across plate types

Most plates you’ll encounter fall into a short list of patterns. Passenger vehicle plates use 7 inch horizontal spacing. Motorcycles use roughly 5 13/16 inches. Trailers sometimes share the passenger pattern but occasionally use a narrower one tied to the trailer’s tag bracket design.

A few things explain the variation:

• Older manufacturing jigs from decades past sometimes produced slightly different hole placements that still circulate on reissued or antique plates.
• Specialty or sponsor-branded plates occasionally shift hole position to accommodate a logo or graphic element without crowding the characters.
• Plates imported from outside the country, or novelty plates, may follow entirely different sizing conventions and won’t match a domestic bracket at all.

The fastest way to spot a non-standard plate is to measure it yourself rather than trust the bracket you already own. Lay the plate flat, measure hole center to hole center, and compare against the 7 inch passenger or 5 13/16 inch motorcycle benchmarks before buying hardware.

How to measure hole spacing and prep for drilling

Getting the measurement right before you touch a drill prevents a cracked plate or a stripped bumper hole.

1. Measure center to center. Use a tape measure or calipers and measure from the center of one bolt hole to the center of the other, not edge to edge, on both the horizontal and vertical axis if your plate has four holes.
2. Check both axes separately. Passenger plates often need both the 7 inch horizontal and roughly 4 3/4 inch vertical measurement confirmed, since a plate can match on one axis and not the other.
3. Look for existing mounting points first. Many vehicles already have factory dimples, threaded inserts, or a tow-hook opening that lines up with standard spacing, according to Carparts, so check before assuming you need to drill at all.
4. Mark and pilot drill. Use a center punch to mark your spot, then a small pilot bit before stepping up to the final hole size.
5. Drill from the back on acrylic or reflective plates. Support the plate with a piece of scrap wood and drill from the rear surface forward to avoid chipping or delaminating the reflective coating, a method recommended by the British Numberplate Manufacturers Association.

Pro Tip: Tape a printed template of your plate’s hole pattern to the bumper first and double-check it against the plate itself before any drill touches metal or plastic.

Hardware and fastener specs for a secure mount

The right fastener keeps a plate from rattling loose on the highway. OEM service documentation commonly points to bolts around 6.0 millimeters, or about 0.24 inch, in diameter for standard mounting, per OEM service bulletin guidance. Length depends on whether you’re mounting straight to the bumper or adding a frame, since a frame typically adds a quarter inch or more of stack height that the bolt needs to clear.

A few practical notes:

• Stainless steel or coated bolts resist rust better than bare steel, especially useful in states with road salt or coastal humidity.
• Washers or rubber bushings help when a hole is slightly oversized or when you want to cushion the plate against vibration.
• Self-closing screw caps give a cleaner finish and keep moisture out of the bolt head.

Fitting options when there are no factory holes

Not every bumper comes pre-drilled, and that’s not necessarily a problem. A vehicle-specific bracket, built for your exact make and model, usually lines up with existing dimples or recessed mounting points without any guesswork. A universal bracket works too, but it demands more careful measuring since it’s not shaped around one vehicle’s contours.

• No-drill options, including tow-hook mounts and grille-clip brackets, let you secure a plate without putting a hole in painted sheet metal, a trade-off that trims some rigidity for zero bumper damage.
• Many manufacturers mold dimples into the bumper as a pre-marked starting point, and following the factory service instructions for those dimples, as some Subaru models call for, avoids guessing at placement.
• When in doubt, a no-drill bracket is the safer default for anyone who isn’t confident about hole spacing before committing to metal.

Fixing common fit problems without damaging your vehicle

A plate that doesn’t quite fit the holes you have isn’t a reason to force it.

• Holes too wide: rubber spacers, oversized washers, or a thin backing plate close the gap without drilling.
• Holes too narrow or oblong: a slightly larger pilot bit can widen an existing hole, but stop frequently to check fit rather than drilling all the way through in one pass.
• Slightly misaligned holes: redrilling to the correct 7 inch center-to-center spacing with a 5/16 inch pilot bit, then stepping up to final size, is a common fix referenced in OEM service documentation.
• Repeated misalignment or a cracked bumper edge: swap to a bracket system or have a shop handle it instead of continuing to enlarge holes by hand.

What actually matters when mounting a plate

Most fitment headaches come from skipping the measuring step, not from bad luck. Favor factory mounting points and no-drill brackets whenever they’re available, since they cost nothing in rigidity and save your bumper’s finish. When drilling is unavoidable, measure center to center on both axes, pilot drill, and check behind the panel for wiring or a fuel line before committing to a hole. Frames and covers add stack height, so always re-check bolt length once you’ve added one.

— GoGhost

An accessory option worth knowing about

If you’re already thinking about what goes on your plate beyond mounting hardware, a cover is worth a look. We offer license plate covers designed to fit standard plate dimensions with tool-free installation, so they drop onto an existing mount without requiring changes to hole spacing or brackets. Both electric and mechanical versions are available, providing options between a flip-of-a-switch mechanism or a manual sliding curtain depending on your installation preference.

This isn’t a fix for mismatched bolt holes, it’s a separate accessory for drivers who want control over plate visibility once the plate itself is properly mounted. Check out the Ghost Curtain Cover for exact fit details and current availability.

FAQ

My license plate holes are too wide. What can I do to fix them?

Rubber spacers, oversized washers, or a thin backing plate behind the license plate close the gap without any drilling. If the holes are significantly oversized, a bracket designed for your plate size is a more durable fix than repeated patching.

What size hole to drill for license plate?

Standard passenger plates use an elongated hole about 1/2 inch by 0.28 inch, spaced 7 inches apart center to center horizontally, according to the Texas DMV specification. Start with a small pilot bit and step up gradually rather than drilling the full size in one pass.

What are the differences between a 2-hole and a 4-hole license plate frame?

A 2-hole frame secures the plate at the top only, relying on the horizontal 7 inch spacing, while a 4-hole frame adds the roughly 4 3/4 inch vertical spacing for a more rigid mount. Four-hole setups resist vibration and sagging better over time, especially on vehicles that see rough roads.

Can I mount a license plate without drilling holes in my car?

Yes, no-drill brackets that clip onto a tow hook or grille opening let you secure a plate without touching the bumper’s paint or metal. These options trade a bit of rigidity for completely avoiding permanent modification, which makes them a good default when you’re unsure about hole spacing.

Sources

• License Plate Specifications — Texas Department of Motor Vehicles
• License Plate Standard, Edition 3 (September 2025 update) — AAMVA
• J686: Motor Vehicle License Plates — SAE
• Carparts