You will need 5 buttons.

You will need a size US 3 (3.25 mm) circular needle at least 32” (100 cm) for finishing.

Finished measurements:
Chest circumference: 42.5( 46, 51, 54.5, 58.5)“ 108( 117, 129, 138, 148) cm.
Finished length: 25( 26, 27, 27.5, 28.5)” 64( 66, 68, 70, 72) cm
Sleeve underarm seam: 17.5” (44 cm) for all sizes.

Yarn used:
Rowan Handknit Cotton
A. 251 Ecru - 6(7, 7, 8, 9) balls
B. 239 Ice Water - 9(10, 11, 12, 14) balls
C. 335 Thunder - 2(2, 2, 3, 3) balls (Shade substitution for the original 727 Turkish Plum shade photographed.