Question

Which one is correct? I wear a medium or I wear medium?

Answer 1

I wear a medium.

Step-by-step explanation:

This one is a bit tricky as both can be said but only one is grammatically correct. You need the article (a). Although when speaking people tend to say both and it works

i.e., I wear size medium or I wear a size medium.

I wear size 6 pants or I wear a size 6 pants.

When writing, I recommend using (a) as this is the correct form. When speaking though, you can be a little freer.

Hope this helps!