What is UE4 units and how can I change the unit setup?

Hello everyone. I am new to UE4 and I want to create a real world measured house in it.

I created the living room for the house and for the test I used the blue third person character but the character was very small for the room.
Is 1 uu = 1 meter in Unreal or is it different? Based on what other posts say the height of the blue character is 190 cm so there is no problem in the character.
I will be thankful if somebody can explain this to me.

HI!

Default 1uu = 1 cm. Blue character has real world size - 190 cm. Check system properties of your 3d program and import properties. Maybe system measurement of your programm not align to system measurement of UE4.

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