This means that if you

Bust circumference: 105 (109) 113 (119) 125 (132) 136 (144) 156 cm [41¼ (43) 44½ (46¾) 49¼ (52) 53½ (56¾) 61½ inches]

do not bleach

5 mm [US4] double-pointed needles

A size S blouse has a bust circumference of 88 cm [34¾ inches] which in the given example would give you 2 cm [¾ inch] of negative ease

Ivy Cardigan 34/35 This means that if youThe Ivy Cardigan is worked flat back and forth from the top down in one piece. The yoke is constructed with shoulder increases on the first section. On the next section increases are worked on the sleeves only, and on the final section classic raglan increases are worked on both body and sleeves. The sleeves are worked in the round on double pointed needles or on a circular needle using the Magic Loops technique. At the end, plackets are worked along