family is/are

My family is big.

Sometimes (particularly in British English) we can vary whether we use the singular or plural verb in these cases. It can change the meaning though. Remember that the singular verb is used when we are thinking of the group as a whole single entity. The plural verb can be used when we are thinking of the individual members of that group. I would interpret your sentences:

My family is big.

Thank you very much!!!

my family is big

It is sometimes useful to think of musical groups:

The Beatles are John, Paul, George, and Ringo.

Pink Floyd is the most influential band in the 20th century.

I agree with the advice given -- but another possiblity that avoids the is/are decision entirely is "I have a big family." (or, if you want to make it perfectly clear that you are talking about your parents and siblings instead of your spouse and children, "I come from a big family.")

Thank you

No you can’t . My family is big .

Wht is right sentence??

My family is big or My family are big.