Mushroom head

Anybody know how common mushroom heads are? 25%, 50%, 75% of penises? I couldn’t find anything on it. I’m 4.2” MSEG, but the head is 4.75” or so. I love the shroom. I know most girth stats are done as MSEG’s which makes me pretty damn small, but maybe not that small in practice, depending on how common mushroom heads are.