Materials
12 (13, 14, 15, 15) x 50 g balls of Topaz (non-RSA quality) or
8 (9, 10, 10, 10) x 50 g balls of Topaz (RSA quality).
7 buttons for crew neck.
5 buttons for v neck.

Note that the overseas quality Topaz uses more balls than the local RSA quality.