Being as it's Saturday, I guess it's time for a more substantial statistics dump. I did try to do an estimate on how many of my heels are dressy vs. how many are casual. I have decided that this is too subjective and difficult a task to get an accurate number. I think it is clear that clogs can never be dressy, but how about wooden heeled sandals? I think usually not, but my Alaia sandals surely come close. Can a wedge sandal ever be dressy? Yes, but under what circumstances? Anyway, that's a fool's errand, so I all I can say is that roughly 40% of my shoes you might call "dressy," and the other 60% are more "casual."
The more normal statistics are heel height and footbed steepness. For absolute heel height, as measured up the back of the heel, but perpendicular to the floor, we have the following:
Less than 4": 14.2%
4" to including 4 1/2": 31.1%
Over 4 1/2" to including 5": 28.3%
Over 5": 26.4%
Over the past several years, there has been a shift from the third category to the second. This is because a smaller percentage of my shoes are platforms than was the case before, so absolute heel height has shrunk in certain categories. However, in the next batch of numbers, you can see that this has caused the number to shift in the footbed steepness category even more dramatically. Steepness, for those of you who don't know, or who use a different definition, I measure steepness by subtracting out the height of the platform, if any. For example, my Nine West Plantera pumps have an impossibly tall 5 1/2" heel, but they also have a 1" platform, so the total steepness is a less impressive 4 1/2". I started at 3 1/2 inches because that is where to my mind that heels start feeling like heels.
Less than 3 1/2": 15.1%
3 1/2" to including 4": 28.3%
Over 4 to including 4 1/2": 46.2%
Over 4 1/2": 10.4%
As you can see, there is a big increase in the more than 4 to 4 1/2" category. If you included steepnesses that were right at 4" in that category, the number would be even more overwhelming. I guess this is where I like to be, but there is a variation even within this category. With 4 inch or less, I can just slide/pull them on and go. With 4 1/2 inch, that is highly inadvisable without preflight.
As always, if I have a shoe which has no footbed liner or cushion, which is often the case with wooden heels, I "discount" the heel/platform height by 1/4" so that we are comparing heights more equally.