white dress with blue embroidery Royal Unique and Long Tail 40/(M) Front Body Length White & Navy Embroidery Mimi

I found all of these at Nordstrom, which historically I feel has always had the best formal occasion plus size dress options online

This Dreamy Boho Maxi Dress Features A Flattering V-Neckline, Soft Elbow-Length Sleeves, And A Smocked Waist For A Stretchy, Comfortable, And Feminine Fit

Keep the sweater a solid

This dress will show off your curves with a square neckline, adjustable spaghetti straps, and a form-hugging fit

Knitwear such as a fine gauge jumper or polo neck can replace a shirt and tie combination, offering a more relaxed approach that still feels appropriate

I would even go as far as to say that they should be a go-to option to think about when planning your outfit for one