You will need one button and one press stud (snap), for the finishing. You could also use a decorative clasp or pin.

Finished measurements:
Bust circumference: 38.5(41.25, 45.75, 50, 54.25)“ 98(105, 116, 127, 138) cm
Finished length: 27.25(28, 28.75, 29.5, 30.25)” 69(71, 73, 75, 77) cm
Sleeve to armhole: 17(18, 18, 19, 19)“ 43(46, 46, 48, 48) cm

Yarn used:
James C. Brett Norske
Shade NK08 Natural - 8(8, 8, 8, 9) balls