Cocktail
Black tie
Creative black tie
White tie
Dress outline with an adjustable hem
A plain dress outline with a hem you can move between above the knee and the floor. Labels at the side show knee, mid-calf, ankle and floor.
Hem length:
Length
Fabric
Shoes
Bag
Illustration only. These are common etiquette norms, not strict rules; an invitation or a host's note always wins.