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.
752 × 560
Source:https://www.wishingdress.com/products/royal-blue-bridesmaid-dress-elastic-satin-bridesmaid-dress-long-bridesmaid-dress-bd00158
744 × 800
Source:https://www.dhgate.com/product/popular-mauve-bridesmaid-dress-2-styles-formal/457223436.html
768 × 768
Source:https://www.walmart.com/ip/Tons-Of-Style-Prints-POROPL-Bridesmaid-Dresses-Plus-Size-Sequin-Back-Zipper-Gold-Velvet-High-Waist-Formal-Dress-Clearance-Purple-Size-16/3604969155
1124 × 960
Source:https://www.aliexpress.com/item/1005004882658905.html
1000 × 830
Source:https://www.amazon.com/Numbersea-Homecoming-Bridesmaid-Sleeves-Wedding/dp/B0B7NYK2Z5
380 × 480
Source:https://www.rjerdress.com/pages/size-chart
1000 × 773
Source:https://www.chicbridals.com/pages/sizing-ordering
563 × 738
Source:https://www.laurafashionshop.com/products/elegant-royal-blue-gradient-bridesmaid-dress-a-line-cheap-long-ombre-bridesmaid-dresses-ld756
1920 × 1080
Source:https://shopscai.com/pages/size-chart
480 × 1860
Source:https://www.goldengown.co.nz/size-chart/