Mine is curved too, and slightly leans to the left, which means a ruler won't
be accurate at all. Instead I do mine with a measuring tape i think it's called, and I do it from the base to the tip of the head, from the side, but no stealing
cm/inches or bone pressing or any bs like that. Just an honest measure in my opinion, you can't measure something that's not straight, with something that's straight.. that simple. So don't worry about it Rimmer9.