I need help converting measurments to european standards.

When you talk about wheight of fabric you talk about oz. I can easily convert oz to grams but then I run into trouble.

Oz per square something I guess but square what??? Inch??

20" means 20 inch right?

Are there different inches? I know they use inches in the UK but are they the same as yours over there? Just to make sure google converts everything the way I want to.

Thanks in advance.