First of all, the requirements for this feat is to procure yourself with lower limbs, preferably with the addition of their corresponding locomotive translocation devices, feet.

oops, wrong image.

Once you've procured yourself with legs, you must equip them.
To equip them you must press "E" to open you inventory. A UI should show up showing your body count, but i bet you can't even see it.
Go over the lower armor section and equip FEET.

Sh*t my pictures keep messing up.
I swear they are not mine.

Once your legs have been adjusted to your prefered height, you should be able to notice how f*cking short you are,
you midget.

what was i even talking about?

https://www.youtube.com/watch?v=VdnE-_mmTGM