If she were older I would of put a foam board backing on the rainbow to keep it straight
If you want something more fitted but still forgiving, simple prom dresses in a clean column or gentle fit-and-flare silhouette can also work
Wedding Vendors: Photographer: Sandra Morlet Photography Planning + Styling: Molly Boyd Event Design Flowers: Fifty Flowers Floral Design: Signature Florals Stationery: Humble Honey Bee Design Bar Sign: Rubi and Lib Design Studio Tablecloth + Chair Sashes: Linens by the Sea Crossback Chairs & Cutlery: US Tent Rental Vintage Chairs, Side Table, Glassware + Chargers: The Copper Acorn Calligraphy on Macaroons: Shannon Kirsten Illustration Clothing Rack: Shop Andis List Hair: Hair by Sue Tassels: AZ Supplies Silk Ribbon: Marshmallow Silk Venue: Private Residence in Bradenton, Florida Models: @annediven, @ashleycasey05, @thebrittanyjean, @candiceelaineh, @codyhinson, @franciscostello, @_hannahthompson_, @kiwikaralis, @kristinasparacino, @lauren.michelleh, @meagan.schaedel, @lone.wolf.style, @stephanieboydmitchell, @thesunnyslp

Image & Makeup credit: Barnet + Boatrace Make Me Bridal Hair & Makeup Pro from Dorset Sleek and Straight Sophistication Sleek straight hair worn down is perfect for minimalist one shoulder wedding dresses
This product should be changed every 3 to 5 days