The shirts are the size XXL
The shirts are of the size XXL
The shirts are in size XXL.
Is there any difference between three sentences? If there are differences I couldn’t understand what are those?
The shirts are the size XXL
The shirts are of the size XXL
The shirts are in size XXL.
Is there any difference between three sentences? If there are differences I couldn’t understand what are those?
I agree with @JacobLee-Hart that the only correct sentences are:
(1) The shirts are size XXL.
(2) The shirts are in size XXL.
The difference between (1) and (2) is that (1) specifies the size of certain shirts while (2) indicates the size in which they are available.