Yeah, it is! 52x11 cm is standard size, although for the front one only in some cases we can use 34x11 cm which i think is the one you use in Australia or very similar.You must have a huge number plate in Spain, the Australian plate mount is ridiculously oversized for our plates and a lot of people replace them with something more suitable. I did!
I originally cut the ends off the OEM bracket but it was still too big.That's nice, easy way and looks perfect