Size 0: Bust 31.5", Waist 23", Hips 34.5"
Size 2: Bust 32.5", Waist 24", Hips 35.5"
Size 4: Bust 33.5", Waist 25", Hips 36.5"
Size 6: Bust 34.5", Waist 26", Hips 37.5"
Size 8: Bust 35.5", Waist 27", Hips 38.5"
Size 10: Bust 36.5", Waist 28", Hips 39.5"
Size 12: Bust 38", Waist 29.5", Hips 41"
Size 14: Bust 39.5", Waist 31", Hips 42.5"
Size 16: Bust 41", Waist 32.5", Hips 44"
Size 18: Bust 43", Waist 34.5", Hips 46"
Size 20: Bust 45", Waist 36.5", Hips 48"
Keep in mind that these measurements are just a guide, and it's always best to have your bridesmaids try on dresses in person or order a size up if they are in between sizes. It's also important to consider alterations, as most dresses will need to be hemmed or taken in to ensure a perfect fit.
581 × 691
Source:https://worntolove.com/products/worn-to-love-mermaid-lace-long-evening-dress-affordable-gold-appliques-backless-evening-dresses-sleeveless-long-burgundy-plus-size-2-16-female
1037 × 746
Source:https://circleparkbridal.com/bridesmaids-size-charts
627 × 929
Source:https://www.aliexpress.com/item/1005003327297640.html
350 × 292
Source:https://www.amazon.com/Galawaqe-Bridesmaid-Dresses-Chiffon-Pageant/dp/B0BYZDPHGS
599 × 570
Source:https://www.etsy.com/listing/728133530/long-sleeve-bridesmaid-dress-dark-blue
347 × 946
Source:https://www.ebay.com/itm/255977221002
524 × 1010
Source:https://www.dhgate.com/product/2017-elegant-royal-blue-bridesmaid-dress/392935478.html
792 × 766
Source:https://cheronsbridal.com/products/copy-of-julietta-rosario-3262-cherons-bridal-wedding-gown
421 × 769
Source:https://www.flowergirlsonly.com.au/sizing-chart/
1000 × 1610
Source:https://www.amazon.com/Ceomate-Dresses-Shoulder-Occasion-Bridesmaid/dp/B0C367VRXS