Men's shirt by Simon Carter.  Blue herringbone.  Spread collar.  100% cotton.  Long sleeves.  Double cuffs for cufflinks.

Size  Collar size 17.5 (44 cm)

Actual garment measurements:

Chest 50 inches (maximum) 

Shoulder to shoulder 20 inches.

Length at the back 33 inches.

Sleeve length, shoulder to end of cuff, 26 inches. 

Sleeve length, armpit to end of cuff, 23.5 inches.