The pattern is written for size X-Small with changes for Small, Medium, Large in 
Shown in size Small.
This cardigan is made almost without seams! You will have to make only two side seams.
Finished length: for sizes XS and S " 54cm or 21 1/4 inches, for size M and L " 65cm or 25 1/2 inches
Finished back: with such kind of shrug it is most important that it fits well your back. Take measurement of your back in the widest place (it is just below the shoulders) and see which size you should make.
14 1/4, [15 3/4, 17 1/4, 18 3/4]inches or 35.5 [39.5, 43, 47]cm wide
If no size is fitting you and you need it bigger, you can use worsted weight yarn instead of DK weight yarn. But in this case I don(tm)t provide quantity of the yarn needed.
16dc = 10cm or 4 inches
10rows = 11cm or 4 1/4inches
All my patterns are written in English, in US terms.
I learned to crochet and knit when I was a little girl. Many years later, being stay at home mom I finally realized my dream - officially became a crochet designer! :-) I hope you will enjoy my patterns! :-) Happy crocheting!