How do I choose a dress for a wedding I am attending as a guest?

The answer

Start with the invitation: note the time of day, venue and dress code, then avoid white, ivory and very pale champagne unless the couple asks for it. Choose a fabric and length that suit the setting, and a dress you can sit and dance in comfortably. A neckline and sleeves you will not need to adjust all night, plus a wrap for cool venues, make the day easier. Shoes you can stand in for hours matter too.