flowy short white dress Hopiumy for Women Summer Square Neck Sleeve Ruffle Mini Dress College Graduation Short Dresses (White, S) at Amazon Women's Clothing store 1 inch = 2.54 cm Romantic Flowy Sheer Tulle Short

Debretts, the British etiquette guide, still says that "for most people, this is the most formal dress code they will ever encounter"

Satin, mikado, sequined mesh, and structured crepe are excellent choices

If Only Studio Surplice Long-Sleeve Shirtdress Ser.o.ya Tropez Maxi Dress Lilly Pulitzer Calina Linen Midi Sundress COS Gathered Asymmetric Dress Sylvia @sylviacolella above (read her style interview here) teams her maxi dress with a chunky bracelet and blue shoes

Some stylish options include this wool-blend cream coat from Reiss, this removable-cape trench from Ann Taylor, and this cozy cashmere style

Here's a long prom dress that is sure to be a hit with exquisite contrasting embroidery

Turn up the allure with the V-neck Ruched Spaghetti Straps Dress with Slit