Number Plate Styles in the UK: Every Road-Legal Style Explained

Number plate styles, the short answer: in the UK you can choose between printed (flat), 3D gel, 4D laser-cut, 4D gel, bevelled (also called 4D retro), hex, short, oversized and EV green flash plates, and all of them are road legal as long as the plate follows the same core rules. The style changes how the characters look and what shape the plate is. It doesn’t change the font, the colours, the character sizes or the markings the law asks for.

Written by the PlateBoss team, led by owner HD. We’ve been making plates since 2019 and are a DVLA-registered number plate supplier with a workshop in Hounslow, west London. Checked against GOV.UK guidance on number plates and DVLA leaflet INF104, October 2026. How we write our guides.

In this guide

• What every legal style has in common
• The road-legal styles
• Styles that aren’t road legal
• Which style should you choose?
• FAQs

What every legal number plate style has in common

Whatever style you pick, these rules stay the same. They come from GOV.UK and DVLA’s INF104 leaflet:

• Black characters on a white plate at the front and a yellow plate at the back.
• Reflective plate material, with no pattern in the background.
• The characters must be a single shade of black (for plates fitted from 1 September 2021), and they can’t be removable or reflective.
• The standard font, at the legal size. On a car that’s 79mm tall and 50mm wide, with 11mm between characters and 33mm between the two groups.
• The plate must be marked with the British Standard number (BS AU 145e), the supplier’s name and the postcode of the place that made it.
• Plates can only be made by a DVLA-registered number plate supplier, who has to see your ID and proof you’re entitled to the registration.

Two things the law doesn’t fix are the overall size and the shape of the plate. That’s why short, hex and square plates can be legal. And GOV.UK says plainly that plates can have 3D (raised) characters, which is what makes gel and 4D styles legal.

Break any of those rules and the plate isn’t legal, whatever it’s called. You could be fined up to £1,000 and the car will fail its MOT.

The road-legal number plate styles

Printed (standard)

Flat black characters printed on the plate. This is what most cars leave the factory with, and it’s the cheapest option: our replacement plates are £29.99 a pair. If you just need a cracked or faded plate swapped before an MOT, this is the one.

3D gel

Each character is printed and then covered in a clear resin dome, so it sits slightly raised and catches the light. It’s a step up from flat print without looking loud. 3D gel plates are £44.99 a pair. We cover the legality in are gel number plates legal?

4D (laser-cut acrylic)

The characters are laser-cut from solid black acrylic and fixed to the plate, so they stand proud with crisp, square edges. We make them in 3mm (£44.99) and 6mm (£64.99). See 4D number plates and are 4D plates legal?

4D gel (sometimes sold as “5D”)

A 4D laser-cut character with a gel layer on top, for a glossier finish. “5D” isn’t an official term; it’s a sales name for this style. Ours are £64.99 for 3mm and £79.99 for 6mm. Browse the 4D gel range.

Bevelled (also called 4D retro)

Raised 4D characters with angled, bevelled edges that catch the light while staying on legal white and yellow. Bevelled and 4D retro are the same plate under two names. It’s our best seller and the style we’re asked for most by name. Bevelled plates are £69.99; see also retro number plates and are bevelled number plates legal?

Hex

A plate with angled, hexagon-shaped ends instead of square corners. Because the law sets no plate shape, a hex plate is legal as long as the margins and characters are the legal size, and we make them for registrations of up to seven characters. You can have any face style on a hex plate, from printed to bevelled. Hex number plates start at £49.99, and our guide are hex number plates legal? has the detail.

Short

A shorter plate for cars with a small recess or a registration with fewer characters. Short plates are legal when the characters stay at full size with the proper spacing; squeezing them to fit is what makes a short plate illegal. Short number plates start at £49.99.

Oversized, 4×4 and square

Bigger plates for vehicles with larger recesses, and square two-line plates for imports and some rear panels. The same character rules apply, just with more plate around them. See oversized plates and square number plates.

EV green flash

A green flash on the left-hand side of the plate, allowed since 8 December 2020 for zero-emission vehicles only. Hybrids don’t qualify. You can combine the flash with printed, 3D gel, 4D or retro characters; ours start at £34.99. Read green flash number plates: who can have them or go to EV number plates.

You can also add a side badge to any of these: the Union flag, Cross of St George, Saltire or Red Dragon of Wales, with an approved identifier such as UK. More in number plate flags and badges.

Number plate styles that aren’t road legal

Some styles sold online look like the ones above but break a rule, so they’re for shows or off-road use only:

• Show plates: non-standard fonts, italic or stylised characters, squeezed spacing, or no supplier and BS markings. See show plates vs road-legal plates.
• Two-tone or coloured characters: since 1 September 2021 the characters must be a single shade of black, so 4D characters with a different coloured edge or face are out.
• Patterned or carbon-effect backgrounds: the background can’t have a pattern.
• Black and silver plates: only for qualifying historic vehicles built before 1 January 1980. Our black and silver guide explains who qualifies. We don’t make them.

We see the result of this a few times every week: drivers who bought show plates from a marketplace or a bedroom seller come in to buy a legal set. One customer had bought plates from a market stall and was given a £100 on-the-spot fine and points for bald tyres; he came to us afterwards for 4D retro plates.

Which number plate style should you choose?

There isn’t a “most legal” style; they’re all equally legal when they’re made properly. So it comes down to looks, the car and budget. From what we see at the Hounslow counter:

• Bevelled is the one people ask for by name. It’s our most popular style because it’s the most eye-catching and the newest.
• Hex gets asked about all the time, usually by younger drivers and people with sportier cars, and usually with the question “is this actually legal?” (it is).
• Oversized and 4×4 plates are mostly for Range Rovers and Land Rover Discoveries. Same process and same documents as any other plate.
• Printed is the sensible choice when it’s a straight swap, for example a cracked plate ahead of an MOT.

Whatever you pick, you’ll need the same two documents: photo ID and proof you’re entitled to the registration, such as your V5C. Our documents guide lists every accepted document, and how much do number plates cost? compares prices across styles.

Popular styles

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Bevelled Number Plates

Rated 5.00 out of 5

£69.99

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4D 3mm Number Plates

Rated 5.00 out of 5

£44.99

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4D 3mm Gel Number Plates

Rated 5.00 out of 5

£59.99

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3D Gel Number Plates

Rated 5.00 out of 5

£44.99

Number plate styles: FAQs

Sources

• GOV.UK: Displaying number plates
• GOV.UK: Rules for number plates
• DVLA leaflet INF104: Vehicle registration numbers and number plates