Skysight - Simply Bigger Trees
Skysight - Simply Bigger Trees is a mod for The Elder Scrolls V: Skyrim that will increase trees in height about 1.5 times the original size. Relative sizes do remain, however, so trees that had been scaled in the original game will still be scaled in comparison to other trees, only now they'll be bigger in comparison to their original counterpart.
As the mod changes the vanilla meshes, all trees that use these meshes will be affected. This causes the mod to be compatible with pretty much every other mod.
It's however incompatible with mods that change the vanilla tree meshes.