Finding the right size is not my concern, but massaging them to fit fork crown and stays, as there is only around 55-57 mms.
I had 700cx60 bluemels on there previously and had to take quite a chonk out of them at the seat stays
Did you cut the mudguards to fit or shape them? I cut holes in my aluminium guards so they'd fit in my forks, but I'm interested in how hard it is to shape them if I ever need to replace these ones.
26" mudguards work well for me with that tyre size