Buying Vintage Midi Dress

buying Shelton Stroller nylon midi dress in blue, lime, and neon pink. The dress is labeled a size 12; however, is not a modern size 12. The dress is best for a modern MEDIUM and measures 38 bust, 29 inch max waist, open hips, and is 42 inches long. Oh, and there's pockets! No issues to note and is pictured with the necklace set from separate listing.