This is a great vintage Hawaiian shirt from Go Young.

Made of poly, it's an amazing print featuring rainbows, blue palm trees and yellow hibiscus.

The shirt has a big collar, plastic buttons, a left chest pocket, and a square tail.

This shirt is in MINT condition, with only the tag showing its age.  Guaranteed to be authentic and perfect. 

Marked M and, because it's vintage, fits smaller that a modern-day M. This is more of a current S fit.

Across the back, laid flat and unstretched, the shirt measures 21.5 inches from armpit seam to armpit seam and 28 inches from the collar seam to the bottom of the back.

Please check/know your measurements before buying as tag sizes differ between brands and even within the same brand.