These don't fit with Lor-Amaran cobha, so the concept is up for grabs.
In the wooded worlds, giants always seem a bit out of place; crashing through trees, knocking things over, bellowing... It just isn't practical. So what if giants weren't so human proportioned?
These giants could stand a bit higher than the treetops, but would be only a bit thicker than trees as well. They can slip dangerously fast through the woods, so if you have to hide from one, your best bet is underground (I don't know what sort of temperament they have, I just got the image of being chased down by a tall, light-footed thing with sharp eyes and thought it was a fun idea). They would probably blend with the forest to some extent, and might not look very human at all. I imagine them having voices like the wind in the trees so they're not given away to lower folk, but that's up to the author's discretion.
What do you think? Want them in your world?
I like the idea. Who knows, maybe I will use it some day.