Your Constitution score increases by 2 and your Strength increases by 1.

Due to your magical nature, spells and effects which disable magic are dangerous to you. When you start your turn in the area of an Antimagic Field or are targeted by the Dispel Magic spell you must make a constitution saving throw against the casters spell save DC. On a success you take 3d6 Force damage, on a failure you fall unconscious for 1d4 rounds.   

Due to being made of Plate Mail, you have an AC of 18, but have disadvantage on dexterity (stealth) checks. 

You are proficient with simple and martial weapons. 

Your base walking speed is 30ft.

Animated Armours are created full sized at the end of a lengthy ritual, their minds fresh as a new-borns'. Over time they learn from their surroundings and grow into a true individual, some perhaps being created with minds or having souls transferred into them. They never age, and are immortal unless slain, their armoured forms never corroding due to the enchantments within it.   

Your creature type is construct. 

The alignment of an Animated Armour will depend largely upon their upbringing, one that is ordered to complete tasks constantly, but is treated with respect and dignity may be lawful, but one that disrespected may become chaotic as they rebel against their masters.  

You can speak, read, and write Common and one extra language of your choice.

You are made from the armour of medium sized humanoids, though your appearance may very greatly. Your size is medium.