Is there a specific size a bedroom must be?

Mine is 40.5 square feet its tiny and my parents had to cut the bed down to fit it in i have hardly any room to walk should this be used as a bedroom?

Answers:
people live in boxes. I doubt there's a requirment.

Other answers:
no way! You need you're personal space. My room was the size of a jail cell and it felt like the walls were crushing me in everyday.
no way! You need you're personal space. My room was the size of a jail cell and it felt like the walls were crushing me in everyday.
There is no requirement,but if your house has a basement ask if you can make a room down there, that will give you more space.
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