NWT Lavender Floral Crochet Trim Blouse - Large/XL (runs big, generous size)

I bought this shirt online and cannot return. The tag says L (large) but to me it runs loose and generous in sizing. To me this would fit at least an XL. Pet and smoke free home, brand new with tags and never worn. Floral print round neck long sleeve top featuring crochet trim detail at bust. Elastic at wrists. Keyhole button closure at back. Unlined. Woven. Non-sheer. Lightweight. Fabric Content: 100% Polyester