If your number plate fits neatly into the recess of your bumper and reflects light like a road sign, it is likely correct. If it looks "cool" because it is made of shiny metal or has a 3D raised edge, it is illegal—and you risk a fine. Always ask your supplier for "SABS 1116 compliant" plates to stay on the right side of the law.
In South Africa, the size of a number plate is standardized and regulated by the National Road Traffic Act. number plate size south africa
The standard size for a number plate in South Africa is: If your number plate fits neatly into the
: The 440mm x 120mm size is only legal for vehicles registered for the first time before January 1, 2010 . Compliance Requirements In South Africa, the size of a number
: Primarily used for motorcycles or at the rear of vehicles where the standard oblong plate does not fit (e.g., Nissan Tiida). These use smaller 60mm high characters.
If you're looking for more information on number plates in South Africa, I recommend checking with the South African Department of Transport or a relevant authority for the most up-to-date information.
: Often used for vehicles with square apertures, such as certain bakkies (pickups) or 4x4s. These also require 75mm high characters.