Age. Humans reach adulthood in their late teens and live less than a century.
Alignment. Humans tend toward no particular alignment. The best and the worst are found among them.
Size. Humans vary widely in height and build, from barely 5 feet to well over 6 feet tall.
Languages. Humans typically learn the languages of other peoples they deal with, including obscure dialects. They are fond of sprinkling their speech with words borrowed from other tongues: Orc curses, Elvish musical expressions, Dwarvish military phrases, and so on.
If your campaign uses the optional feat rules, your DM might allow these variant traits, all of which replace the human’s Ability Score Increase trait.
Ability Score Increase. Two different ability scores of your choice increase by 1.
Skills. You gain proficiency in one skill of your choice.
Feat. You gain one feat of your choice.
Languages. Common and one other