Running cap for the big (63cm) of heed?

Evening all. Does anyone have any suggestions for a running cap for a 63cm bonce? One size most definitely does NOT fit all.. as most manufacturers would try and have me believe..

Thanks

I have a head of similar circumference, and have a couple of Arc’teryx running caps that don’t look like they’re ‘perched’ on my head. Outdoor Research and Fjallraven hats also fit me, although I’m not sure if the latter do running gear.

As above, I’m about 61cm and find the OR XL to be a bit too big for me. Been using one of their Radar folding hats for years but they do some more running specific models too!

Thank you @ditch_jockey and @steezysix. The Arcteryx and OR caps both looked great but due to stock/delivery timing I ended up getting a cheapo off Amazon as I needed it for the Great North Run yesterday. I can confirm that “Top-Ex” (short for TOP choice for XXXL adventures ?) caps are indeed MASSIVE! I didn’t even need the biggest one they did which was a first for me! Not the most flattering of headwear mind.. but it did its job on a very wet half marathon.
Thanks again for the recommendations. Will probs treat myself to a nice cap when I’m not in a rush.