The usual Hinterland female figures would probably be classified as 28mm. The picture to the left shows the height of the Princess from the bottom of her skirt to the top of her busby. I would say that her eyes are at about 25mm and the top of her head at 27mm (and the top of her busby to 30mm). Especially in that one would expect females to be somewhat shorter than males, I think these minis will fit in well with a variety of other companies' offerings.
(See below for an estimate of Pulp Characters scale.)
The Pulp Characters minis are somewhat larger in scale, being about 30mm to the top of the head.