Everything worth knowing about Black Tie Optional for Women is below, starting with the part that changes what you buy. The safest read is one considered piece and quiet everything else, which also survives photographs better. Check whether you will be outdoors or standing, because that decides the shoe before the outfit does. Lining is what stops a cheap fabric reading as cheap. The groups below run from the decision that matters most to the ones you make afterwards.

What decides this is shoulder fit, length and how the fabric moves. Everything else is preference. Two from the first group show the range: Simon Miller's Spiral Dress in Black at $395, and simonmillerusa.com's Axon Knit Dress In Autumn Ombre at $130. The first is the considered buy; the second is the one to start with. Check where the waist seam sits on the model against your own proportions. A dress that fits the shoulders can be taken in anywhere else. One that does not, cannot. A higher price mostly buys materials and finishing, and occasionally it buys nothing at all.

Let the dress be the loudest thing you own that day. A belt turns a shapeless dress into a deliberate one. From the second group, nanajacqueline.com's Ariella Sequin Mini Dress (Final Sale) ($434) is the one that earns its place, because it works in more than one context without being restyled. The third group is smaller and deliberately narrower, skirts, for the decisions you make after the main one. None of this needs the whole group. One piece from each is usually enough.

There are 20 pieces here from 13 brands, $25 to $434, all in stock when this was written. We would not buy all of them, and neither should you. beginningboutique.com's Lioness Rendezvous Faded Denim Maxi Skirt at $25 is the low-risk way in, and nanajacqueline.com's Ariella Sequin Mini Dress (Final Sale) at $434 only makes sense if this is a category you already use constantly. On black tie optional for women specifically: the difference between the top and the bottom of this list is real but smaller than the price gap suggests. Nothing here is included because it is famous, and price is not used as a proxy for quality anywhere on this page. If you take one thing away: if you would not buy it at full price, you do not want it on sale.