This is an extremely rare piece of memorabilia from the Live 8 concerts. Extremely rare and hard to find.
The size is Women's Small/Medium. The armpit to armpit measurement is 16.5 inches and the top to bottom (measured from the top middle to bottom middle) is 21.75 inches.
The shirt is new and unworn. It was licensed and released in 2005. It is 100% authentic and genuine.
If you have any questions, please ask. I will respond immediately.