Woman’s sleeveless dress, white, patterned, size medium 10-12

Great dress for a hot summer day. Woman’s sleeveless. White, patterned, could be worn alone or over a swimsuit. Very good condition. All tags are missing but this seems like a medium 10-12 to me. Please use measurements below to make your final decision, Thank you! Flat Lay Measurements: 20 inches pit to pit 24 inches pit to hem