Showing a lot of skin
It's alright to show a little bit of skin as long as it's within your school's dress code; however, you shouldn't go overboard. For example, you shouldn't dress in a low-cut with side cut-outs. You should also avoid an outfit with a slit that is all the way up your thigh.
Too much of the same color
Wearing the wrong fabric
Most proms are formal; therefore, you should dress appropriately for the night. Two of the best dresses to wear are floor-length and mini dresses. As rule of thumb you should ensure that they are made from the right fabrics.
To be on the safe side you should ensure that they are made from silk, taffeta or any other luxury fabric. You should avoid outfits made from linen, jersey, cotton or any other casual fabric.
Wearing ill-fitting dresses
Over accessorizing.
Conclusion
These are some of the fashion mistakes that you should avoid when going to a prom night. When buying the outfit always ensure that you buy it from a reputable store.