Yep as above ^ ^ ^
The physical size of the plate doesn't matter providing your number plate displays the correct:
•character height - 79 millimetres
•character width - 50 millimetres (except the figure 1 or letter I)
•character stroke - 14 millimetres
•space between characters - 11 millimetres
•space between groups - 33 millimetres
•top, bottom and side margins - minimum 11 millimetres
•space between vertical lines - 19 millimetres
(Taken from
DVLA website)