(Ivanka Trump out on the town; photo: I'm Not Obsessed)
With ladylike mania on the runways, the very proper evening coat is a fashion item making a strong comeback. This one could almost masquerade as a dress, and the nipped-in waist & full skirt couldn't be more flattering.
Finding this look at a reasonable pricepoint requires either scouring vintage stores & sites for 40s & 50s evening coats, or, yes, DIY (either you or your fave tailor). Vogue's re-issued vintage patterns are made-to-order for these type of garments; in this case, simply customize a full-skirted shirtwaist dress by adding in both the belt loops and the cutaway in the front. (And then have fun selecting a gorgous silk ribbon to match whatever frock you're wearing underneath.) The great thing about DIY is that you can select whatever fabric you've got your heart set on, and the final product will fit you perfectly.
Vogue vintage pattern V2401 - SewingToday.com