My new word is "smidge". Is it even a word? I don't know. But it does convey the point. Such as at the hairdresser. "Are the bangs short enough?" "No, will you take them up a smidge?"
The funny part is when she repeated me and said "...a smidge." She knew exactly what I was talking about.
I usually include "just" in my description. ie..."just a smidge". That seems to work quite well.
So, if you talk to me on the phone or in person and you hear me say "smidge", just smile to yourself and know that the phase won't last long.