Denoting a dress or skirt of a length that falls above the ankle and below the knee:a tea-length prom dress was out of the question...
For an informal wedding the bride can wear a white or pastel-colored floor- or tea-length dress.
Robin had on a cerulean blue dress that was tea length.
So now you can find all kinds of wedding dresses - short or tea-length dresses, colored wedding dresses and even white sarongs, for a Hawaiian wedding.