Does Steven Erikson provide any information to establish Mappo Trell's stature (height and build), at least relative to his contemporaries? I imagine him to be of similar size to Karsa Orlong, who Erikson envisions as around 8 feet tall. Probably a little shorter, but also more robust. Erikson provides context around most of his large characters; people looking up at Icarium or Karsa, Icarium being slightly shorter than Karsa and of a comparitively slender build, etc. However, I cannot recall him giving such details on Mappo Runt, aside from Mappo being very physically robust.
I am 10% through Toll the Hounds, so please be careful with spoilers past that.