Vintage blue "Jack Niklaus" golf cardigan, Panther Sportswear by Slazenger.  Made in England in the 1950s/1960s, but never used and still in its original box.  Made of Courtelle. 2 lined pockets.

Size:  Chest size 42.
Actual garment measurements are:
Chest 44 inches (so it isn't a tight fit).
Length at the back, 29 inches

Condition:
Many decades old, but unused and still in excellent condition.  It has lost its cellophane bag.  Box is in good condition, a bit scuffed.