I own the Twilight Dress in three colorways and consider it the gold standard for summer wedding guest attire. This versatile dress combines a flattering silhouette–a fitted bodice with a flowy, but not voluminous skirt–with a sensible design: tie straps that accommodate different torso lengths; a partially smocked back to provide some stretch; a square neckline that welcomes fun necklaces and hides strapless bras; and a flirty side slit to allow ease of movement.
While Reformation generally runs slightly small to size–its standard woven fabric is a breathable but inelastic rayon–in the Twilight you can try your normal size, unless you are especially buxom, as the smocked back allows some flexibility.
The Twilight Dress is available in sizes 0-12, and in petite sizes 0P-12P.
I am 5’2, with the following bust-waist-hip measurement: 34-24-33, and found the Twilight Dress in size 0 to be the best fit for me.
If I had to nitpick, I wish the 100% viscose material had a touch of spandex, as it is wrinkle-prone and will require a thorough steam before every wear.
A few more photos of the Twilight Dress under indoor lighting and worn with a less padded bra:
More guest dresses for a cocktail wedding: