Size of door panels

I am ordering new door panels for my 56 Oval Bug
They have sent me a request form asking the size of my door panels
I dont have the old panels so I measured the size of the opening at 565mm x 830mm.
They seem to think that the door panel size should be either 560mm x 840mm or 580mm x 840mm.
Does anyone know what years the door panels changed sizes or which mine should be?
Can anyone with a 56 to 64 (I think they're the same) measure their door panels for me from outside edge to outside edge.
Cheers
Jase

Well if its in another month or 2 I'll have 2 sets of ribbed bumpers.
Anyone else out there interested?