What female Tourists Can Wear in Iran?
Obeying Islamic rules including Hijab or Islamic dress-code is necessary in Iran. However these rules are not observed very strict. You must not worry about maintaining your hijab.
Hair should be covered. It does not mean you shall have a tight scarf around your head. Don't worry, It is very usual that some parts remain out of the cover. It's quite acceptable for women to allow whips of their hair to frame their face. Scarf is the most common covering for head.
Body Should be covered with loose clothes like man shirt, coat or Arms should not be bare.
Legs & feet Legs should be covered down to ankles. Feet can be bare and you can wear sandals. Tight jeans are no problem.
It's a completely false belief that wearing must be dark in Iran. There is no limitation in this respect and we recommend you make sure using light colors in summer.
What Male Tourists Can Wear in Iran?
A simple rule, only shorts and sleeveless shirts are not acceptable in public places.