The different sizes are achieved by way of stitch count AND gauge. Checking your stitch gauge is therefore crucial.
Gauge
XXS, XS and M: 27 sts by 34 rounds to 10 x 10 cm.
S and L: 25 sts and 32 rounds to 10 x 10 cm.
XL and XXL: 23 sts and 31 rounds to10 x 10 cm.
Sizes: XXS (XS) S (M) L (XL) XXL
Bust: 77 (81,5) 87,5 (93) 100,5 (109) 116 cm
** price listed is appx GBP conversion. Price on Ravelry in Norwegian Krone.