95% Rayon 5% Spandex. The small measures 15" across the bust and 12" at waist with 2" of give. The medium measures 16" across the bust and 12.5" at the waist with 2" of give. The large measures 17" across the bust and 13" at waist with 2" of give. All sizes are approximately 38.5"-39" in length from the top of the shoulder to the bottom hem. No trades.