Size range: 12-26 You may have already shopped at ASOS for sequined mini skirts or puff-sleeved cottage-core dresses, but it's also the best place to find affordable plus-size formal dresses. ASOS ...

Best plus-size prom dress with sleeves: Lulus My Whole Heart Long Sleeve Wrap Dress, $79; Best unique plus-size prom dress: Sonlay Sequin Evening Dresses, $78; Best affordable plus-size prom dress ...

British high street sizing charts categorise a dress size 18 and above as plus size. Making dresses for curvier shoppers isn’t simply a case of sizing up the existing collection.