i sat in a yaris recently.. i am very big and bulky. i fit very comfortably in my 96 civic.
in the yaris passenger seat i had to twist my legs to sit. my knees were touching the glove compartment.
this is a similar case in the vitz as well.
the interior design uses very round bulky shapes, causing poor utilization of interior space.
compared to this the ancient straight back taxi alto, has a very roomy interior and a very tiny exterior. mira is also like this.