This is common question which devs answer on KS front page without waiting to be asked, because they know of the mini-obsessed.
25mm? 28mm? 32mm? Need to know.
Great questions. Questions of scale are always tough to answer because there are so many variables that different manufacturers use. For instance, a "25mm" miniature from a manufacturer that uses a "cartoon" style will look very different from a 25mm miniature that is more realistically proportioned. Also, the size of a "25mm" miniature will also vary according to the manufacturer. Some manufacturers say that is the distance from the feet to the top of the head of a "standard height" human. Others, use it as the distance between the feet and the eyes. There is the ambiguity about what exactly a "standard height" human is too.
Plus (as our sculptor was keen to remind us when we were commissioning, them), "25mm" is not a scale. Scale is properly expressed as a ratio. Therefore, when we commissioned the miniatures from the sculptor, our instructions regarding scale were as follows:
These miniatures should fit the popular “heroic 28mm” scale miniature ranges. Generally, we take this to mean that the average American male 5 foot 10 inches tall would be represented as a 28mm tall miniature from the bottom of his feet to the top of the head, giving the miniature a scale of approximately 1:63. The miniatures should be realistically proportioned, though some allowances can be made where necessary to compensate for areas of the miniatures that might be structurally weak after casting.
So that's how we addressed scale with the Incantris miniatures.
BTW, if it isn't too late for changes, how about changing the blue-color minis into beige-color minis? Vibrant colors on plastic look cheap, regardless how good the sculpt is. And dark colors obscures the sculpt details in poor lighting.
This was one of the reasons we did not go with a black wizard team. It was difficult to really see the detail of the wizards. It is a bit late to change up the colors of the teams of the wizards. It is also important to be able to easily distinguish the playing pieces on the board. Having Grey, beige/white, and tan might be too close together.