Yes, 4D number plates are legal in the UK as long as they meet certain standards. These standards are the same as the standards for 3D number plates, with the added requirement that the letters and numbers must be solid black.

Here are the specific requirements for 4D number plates in the UK:

• The letters and numbers must be made of a reflective material.
• The letters and numbers must be black on a white background for the front plate and black on a yellow background for the rear plate.
• The letters and numbers must be a minimum of 50mm high and 40mm wide.
• The letters and numbers must be spaced a minimum of 11mm apart.
• The letters and numbers must be raised at least 1mm above the background.
• The letters and numbers must be solid black.

If you are considering buying a set of 4D number plates, be sure to do your research to find a reputable dealer. You should also make sure that the plates you choose meet the legal requirements in your country.

Here are some of the benefits of using 4D number plates:

• They are more visible to other road users, which can improve safety.
• They are more durable than standard number plates, so they are less likely to be damaged in a collision.
• They can make your car look more stylish and sophisticated.
• They are available in a variety of colors and styles to match your car’s personality.

If you are looking for a way to make your car look more stylish, durable, and visible, then 4D number plates are a good option. They are a bit more expensive than standard number plates, but they are worth the investment if you want to improve the appearance and safety of your car.