I really like this shirt, but I am afraid it is not my size.
Try it on first. If it is the wrong size, you can try another one.
Oh, where is the changing room?
It's over there by the mirror.
Can I take two shirts to try on now?
Yes, you can take three shirts at a time to try on.
I just want to try on these two that I like.
OK, I'll wait here to help you when you have finished.