The short answer on Hobbs Sienna Dress: pick one anchor piece, keep the palette to two colours, and let the shoes decide how formal the whole thing reads. Proportion does more than colour: volume on top wants something narrow below, and the reverse. Repeat one element, a metal, a texture or a colour, and an outfit looks deliberate. 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: 16Arlington's Achi Dress in Poplin at $316, and Duffield Lane's Vivianne Dress in Bright Blue at $119. The first is the considered buy; the second is the one to start with. A dress that fits the shoulders can be taken in anywhere else. One that does not, cannot. Check where the waist seam sits on the model against your own proportions. A higher price mostly buys materials and finishing, and occasionally it buys nothing at all.

A belt turns a shapeless dress into a deliberate one. Let the dress be the loudest thing you own that day. From the second group, Ksubi's ARKANUM DRESS ($140) 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, dresses, 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 dresses here from 14 brands, $119 to $360, all in stock when this was written. We would not buy all of them, and neither should you. Duffield Lane's Vivianne Dress in Bright Blue at $119 is the low-risk way in, and Mother Denim's Alix of Bohemia Winsley Dress - Cactus Bloom at $360 only makes sense if this is a category you already use constantly. On hobbs sienna dress 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.