Formal tunic shirt for day wear, made for Selfridges, probably in the mid-20th century, but still in perfect condition.  Sea island cotton.
This shirt requires a separate collar and collar studs (not supplied, available separately).  
Colour:   White.
Long sleeves.
Plain double cuffs for cufflinks.
Button front.

Size  Collar size 14" 
Actual garment measurements:
Chest 42 inches (maximum).
Shoulder to shoulder 16.5 inches.
Length at the back 34 inches.
Sleeve length, shoulder to end of cuff, 23.5 inches.
Sleeve length, armpit to end of cuff, 21 inches.

Condition:
Vintage shirt, the best part of a century old, but still in perfect condition.  The colour is still nice and white.  Has been recently laundered, to freshen it up, but it shows no signs of ever having been worn.