Sizes (by UK dress size):
10 - to fit bust 32”/81cm; actual size 36.75”/93cm
12 - to fit bust 34”/86cm; actual size 39”/99cm
14 - to fit bust 36”/91cm; actual size 41”/104cm
16 - to fit bust 38”/97cm; actual size 43”/109cm
18 - to fit bust 40”/102cm; actual size 45.25”/115cm
20 - to fit bust 42”/107cm; actual size 47.25”/120cm

Yarn Requirements: Aran weight, 400g balls
1 (2, 2, 2, 2, 2) balls

Note from pattern:
Yo-Yo yarn shades from dark to light, then dark again, twice throughout each ball.