Questions about clothing in Islam for girls?

Undershirts are fine if you get them a couple sizes big. They need to be loose on you. And if it come up over the wrist, it's not long enough. If you take a dress sock without a heel in it, turn it inside out, and pull out the seams carefully, you can make sleeve extenders. It's like leg warmers for your arm. THEN you can wear a 3/4 length over it.