A.
anwered by: canteau
The clip size is going to vary based on the shoes that you are going to be using. MKS does have a size diagram of the stainless toe clip and it can be found here.
http://www.mkspedal.com/sites/default/files/media/2016/08/02/Cage Clip Half , Cage Clip Quarter.pdf
The toe clips do include mounting hardware.