I've formed the impression that I pay more for average sized clothing. I'm average in nearly everything, and when I try to find stuff on sale, my size is always gone.

except height is not really related to airline expenses, since there will be many much shorter people paying same with lot of spare space

they should really have cabin with different layouts and assign seats according height, taller person would get more space, shorter less, but both would have same level of comfort and there would be same capacity of seats, current layout with all seats and gaps between them same is very archaic.

they should really charge people per kg, there can be short and heavy person while tall and skinny, and as i pointed above you can have same level of comfort for passengers without losing capacity assigning seats depending on size, your can do nothing about weight, this will cost airline always more so heavier people should pay more because it's directly related to fuel expenses. we already do it with baggage so why not with bodies?

Uh, they usually do cost more. Click the "Tall" sizes.

That's what he's saying.