Filter sizes for Canon EF lenses

Canon filter sizes are difficult to find, at least in a list form. At one time, all manufacturers went to the trouble to do so with printed brochures but now, with the internet, not so much. With the move to EOS R cameras and the highly capable and versatile EF-RF adaptors, the older EF lenses remain hugely popular. Indeed, with focusing accuracy as good if not better than the older DSLRs, especially when focused off-centre, EF lenses have seen a new lease of life. Filters for lens protection seem to divide opinions, however, I'm strongly in favour of them. Not only do they prevent fumbling with lens caps (keep those for storage), but they're also a lot easier to clean than the front element. Damage the filter, and it's easy to replace. Damage the lens, and that's a real problem. Get it fixed? Sell it? Buy another? I know what I prefer. For Canon lenses, I recommend Canon regular 'Protect' or Protector filters as they're extremely high quality. They're also very reasonably pri