Motorcycle Number Plate Sizes Explained

Motorcycle number plates follow a different layout from car plates. The registration normally appears on two lines at the rear of the bike, and the legal character dimensions—not a single universal outer plate size—determine how compact the finished plate can be.

Do motorcycles need a front number plate?

Motorcycles and motor tricycles registered on or after 1 September 2001 must display a number plate only at the rear. A motorcycle registered before that date may also display a front plate, but it is not compulsory. GOV.UK states that motorcycle registrations should normally be arranged over two lines.

Current motorcycle character dimensions

For motorcycles registered on or after 1 September 2001, the standard dimensions shown in DVLA leaflet INF104 are:

• character height: 64mm
• character width: 44mm, except for the number 1 and letter I
• character stroke: 10mm
• space between characters: 10mm
• space between the registration groups: 30mm
• vertical space between the two lines: 13mm
• minimum top, bottom and side margins: 11mm

Because registrations contain different letters and numbers, the final outer dimensions can vary. A seller should size the backing plate around the correctly spaced registration rather than squeeze the characters into an arbitrary small rectangle.

Can I fit a smaller motorcycle plate?

A smaller backing plate is not automatically illegal, but shrinking the characters, spacing or margins below the required measurements can make it non-compliant. A fashionable “7 × 5” or similarly compact plate cannot be assumed legal for every registration.

The motorcycle MOT manual says the plate must remain legible, use the correct character size, stroke and spacing, and be mounted towards the rear as vertically as reasonably practicable. Tints, films or fixings must not affect the appearance or legibility of the registration. Read the current motorcycle MOT plate guidance for the detailed inspection rules.

Older and imported motorcycles

Motorcycles first used before 1 September 2001 can use a three-line layout and may use the older, larger character dimensions. The MOT guidance also allows a smaller format for certain imported motorcycles that genuinely do not have space for a standard-size plate. That exception should not be treated as a general route to a smaller plate on a UK motorcycle.

What else must a road-use bike plate include?

As well as the correct layout and dimensions, a modern road-use plate needs a yellow reflective background, black characters, the supplier’s mark and the relevant British Standard mark. For plates fitted after 1 September 2021, the characters must be a single shade of black. The latest general requirements are set out on GOV.UK.

Ordering the right bike plate

Browse Plateology’s motorcycle number plates and enter your registration exactly as assigned. For a road-use order, select the compliant specification and follow the document requirements. Show-plate sizes and layouts should be reserved for display or off-road use.

This guide is general information, not legal advice. Check the current GOV.UK guidance and your vehicle’s mounting area before ordering or fitting a plate.