Bright white cotton slim fitting shirt with spandex.  Pretty sparkly diamonte buttons.   Size 16. 

20 inches pit to pit.  17 inches across waist area.

Smart and suitable for day or evening wear.  The shirt is vintage M&S and I don't think you'll find anything similar on the high street, especially at this price.  Hoped to slim into it but never did, so I boxed it away.  In mint condition.