I have exactly a 59-cm head and I don't...
I have exactly a 59-cm head and I don't know if I should go with a medium or large, I hate when there's overlap. Do the helmets fit big or small, what do I go with? I wear my goggles over my helmet and I like a good fit.
The large is for heads 58-60 cm so I think that would fit your head a little better than the med.
Exactly a 59 cm measurement here as well. I bought the medium and it fits perfectly. Not tight, just right.