Vintage sky blue "Jack Niklaus" golf cardigan, Panther Sportswear by Slazenger.  Made in England in the 1960s, but never used and still in its original box.  Garment composition is not marked. 

Size:  Chest size 40.
Actual garment measurements are:
Chest 42 inches
Shoulder to shoulder 22 inches
Length at the back, 27 inches
Sleeve, shoulder to end of cuff, 25.5 inches.
Sleeve, armpit to end of cuff, 22.5 inches.

Condition:
Many decades old, but unused and still in very good general condition, but unfortunately slightly shop soiled: there are faint marks along the fold lines of the sleeves.  I do not know if these will come out in the wash or not.  Box is in good condition, a bit scuffed.