This is a great shirt from Big Bang Denim.

Made of denim cotton, it's blue.

The shirt has a button-down collar, a left chest pocket, a slim fit, and a squarish tail.

This shirt is in MINT condition.  

 Across the back, laid flat, the shirt measures 24.5 inches armpit to armpit and 32 inches from the collar seam to the bottom of the back tail.