The only one I have ever found that fits my size 8 1/4 melon is.....
Attachment 12542

This is only one that really fits and I can wear all day and night in all types of conditions without it squeezing my ears, locking my jaw, cutting off my peripheral vision or muting the outside sounds so I feel like I'm in an isolation chamber.

Do I wish I could get something with a hell of a lot more protection and internal speakers and fit properly?...Hell yea, but so far I have not found one, and before anyone says brand will fit... I have about 10 helmets on the shelf or hanging on the shop wall like a full face Shoie Z, very expensive and bought so I could race on the track, a Bell 3/4 to a brand new XXX large Scorpion that everyone saied would fit(it didn't) along with a few others.
I wish I had half the $ back I have spent over the years trying to find the perfect fitting MC helmet

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Oh I almost forgot...It's a $35 novelty helmet, not legal or safe anywhere...