Having been a model builder as well as a figure sculptor for some years, I am used to working on figures in fractional scales. It seems that this is still lost on many figure modelers.
To put this whole thing into terms that may be easier to understand, 1/20 scale equates to a figure approximately 90mm tall. A 75mm figure approximates to 1/24 scale and a 100mm figure approximates to 1/18 scale.
The fact that figures have always been offered by millimeter measurements rather than a fractional scale has always been a problem for people like me who are more scale oriented. The problem is of course that a numerical measure means very little in scale terms. As a result we have 90mm figures available that scale out to anything between 1/20 and 1/18 scale. Crazy!
Anyway, the 1/20 scale figures are appropriate for a figure that is 90mm from the sole of the feet to the top of the head.
Too bad the insistence on millimeter measurements makes all of this so nebulous.
Cheers!!
Mike