Vintage tunic shirt for day wear, probably made in the 1950s/1960s.  There is no garment composition label, but it appears to be silk.
This shirt requires a separate collar and collar studs (not supplied, available separately).  
Colour:   Sand/khaki/beige
Long sleeves.
Double cuffs for cufflinks.
Button front.

Size  Collar size 14.5" (not marked in shirt, taken from measurements) 
Actual garment measurements:
Chest 42 inches (maximum).
Shoulder to shoulder 17 inches.
Length at the back 34 inches.
Sleeve length, shoulder to end of cuff, 27 inches.
Sleeve length, armpit to end of cuff, 24 inches.

Condition:
Vintage shirt, well over half a century old, and definitely past its best!  It has been professionally cleaned since it was last worn, but that was many year ago.  The shirt has clearly been worn many times, and the cuffs are worn, along the fold line and on the edges.  There shirt has clearly been mended just below the lowest button, I assume to repair a rip.  There are some tiny pin-head sized holes around the waistline - these may be from catching on the belt or braces attached to the wearer's trousers, but I am not sure. The neckband has been "eased", presumably when the owner put on a little weight... There are also some light marks commensurate with the age of the shirt.