This is to show a few ways to modify your armor, if you're too slim for the usual size.
Trimming
Although this may seem like the most obvious solution, unless you're smaller than the average TK (smaller than 175cm) as well, extensive trimming might lead to weird proportions.
If you decide to trim your armor, here's a few things you should look out for:
For forearm armor, you should trim the back of the armor, as the front might have a