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.
2000 × 1601
Source:https://bellesdesignshop.com/products/womens-infinity-bridesmaid-maxi-dress
768 × 768
Source:https://www.walmart.com/ip/adviicd-Semi-Formal-Dress-Women-s-Floral-Lace-Long-Bridesmaid-Dress-Maxi-Formal-Wedding-Party-Gown-Blue-3XL/3920716109
576 × 570
Source:https://www.etsy.com/listing/766804807/mauve-bridesmaid-dress-bridesmaids
440 × 600
Source:https://www.kennedyblue.com/blogs/weddings/15147993-pregnant-bridesmaids-how-to-style-a-baby-bump
1000 × 1754
Source:https://www.amazon.com/Shoulder-Bridesmaid-Dresses-Wedding-Mermaid/dp/B0CSYRRFC8
661 × 759
Source:https://m.rissyroos.com/private-collection-size-chart
2200 × 1600
Source:https://loveydress.com/pages/size-chart
2048 × 1324
Source:https://www.selinadress.com/products/a-line-v-neck-short-sleeve-lace-bridesmaid-dress-cheap-bridesmaid-dresses-brd016
768 × 768
Source:https://www.walmart.com/ip/Phenas-Big-Girls-Lace-Princess-Bridesmaid-Dress-Sequins-Wedding-Long-Ball-Gown-Pageant-Evening-Dresses/1600263661
593 × 507
Source:https://bridalsbylori.com/size-charts/