Kids & adults cardigan made with DK.

To fit chest:

Kids
22" / 56cm - 200g
24" / 61cm - 250g
26" / 66cm - 250g
28" / 71cm - 300g
30" / 76cm - 350g

Adult
32-34" / 81-86cm - 450g
36-38" / 91-97cm - 500g
40-42" / 102-107cm - 550g
44-46" / 112-117cm - 600g
48-50" / 122-127cm - 650g

You will need:
4mm needle
3.25mm needle
5-6 buttons