Sheer button up red blouse, tiered ruffle multi-color lapel and cuffs, gorgeous!

Hi there! I a selling this Sheer button up red blouse, tiered ruffle multi-color lapel and cuffs, gorgeous! I bought it with the tags removed and gave no idea who the designer is or the fabric content. Please comment to ask for measurements of interested:) I’m listing as a M, because I wear that size and it fits well. No guarantee on it being a M, so please ask for measurements