I did my front pads on the front not so long ago. Was going to get EBC but just decided to stay with standard Bosch ones. I think the £25 instead of £80 swayed it!!
I can't remember exact dimensions but Bosch only has one as far as I'm aware, I got them from Andrew page. If ur looking at others ie EBC just go with the cheaper option from research these were same size as Bosch
Hope this helps!
Check out you tube for how to tool me about an hour and saved £100!!