Big (3.5e Trait)
From D&D Wiki
Unlike most members of your race, you are exceptionally large: A giant among your kind. The character is one size larger than normal, and takes on all benefits and detriments of this size.
Prerequisite: Must be of a completely organic race
Benefit: The character takes on all of the benefits of being one size larger.
Drawback: The character takes on all of the detriments of being one size larger.
Normal: A Character normally is restricted to the size of its race.
Roleplaying Ideas: Lumu, a Kaori Barbarian, stands at about 16 feet tall, much larger than her kin. This can cause some issues for living amongst her kind, as well as others around her, as it causes her to experience difficulties fitting within standard armors, buildings, pathways, and furniture, but gives her some benefits, as well, being naturally larger and somewhat more capable in fights.