Your strength score increases by 2,  your constitution score increases by 2 and your intelligence score decreases by 2

The average ettin lives for about 75 years.

Ettins tend towards chaotic evil.

Ettins average about 13 feet

You base walking speed is 30 feet.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern colour in darkness, only shades of grey.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

You can wield and attack with a 2-handed weapon in one hand but you cannot wield and attack with one 2-handed weapon in each hand or benefit from two weapon fighting while wielding a 2-handed weapon. Your hands are too big to use weapons with the light property. You are also to clumsy to be able to use finesse weapons using your dex modifier.

The ettin has advantage on Wisdom (Perception) checks and on Saving Throws against being Blinded, Charmed, Deafened, Frightened, and knocked Unconscious.