Floor-length dresses are not a great choice for petite, delicate women, because they will make them appear shorter. Better alternatives are
knee-length skirts and
midi dresses. Straight cuts can also help you look taller.
Monochrome outfits are ideal: with a tone-on-tone look, your body is not divided up visually, which has an elongating effect.
Of course, you can also combine various nuances from the same colour family to make sure your outfit doesn’t look too boring. Pigeon blue works very well with navy blue, for instance, as does mint with dark green. High heels boost the elongating effect of your outfit.