750 × 500
Source:https://www.windsorstore.com/collections/dresses-formal
585 × 390
Source:https://www.lulus.com/categories/299_2226/formal-dresses.html
1024 × 683
Source:https://www.abcprom.com/products/off-shoulder-green-lace-sequins-long-prom-dress-with-high-slit-off-the-shoulder-green-formal-dress-green-lace-evening-dress-a1391
1126 × 768
Source:https://www.theknot.com/content/what-to-wear-to-a-wedding
1093 × 640
Source:https://en.wikipedia.org/wiki/Formal_wear
1500 × 1000
Source:https://www.brides.com/formal-mother-of-the-bride-dresses-6833065
1024 × 683
Source:https://www.thedressoutlet.com/
585 × 390
Source:https://www.lulus.com/categories/299_2226/formal-dresses.html
1500 × 1000
Source:https://www.luckdresses.com/A-Line-Beaded-Lace-Chiffon-Long-Prom-Dresses-Formal-Evening-Dresses-601269
2250 × 1500
Source:https://www.brides.com/semi-formal-wedding-attire-4800687