Beautiful 100% Lambswool Jumper by St Michaels, made in the UK. Incredibly soft and in great condition. Looks to be an 80s tag but it could be older. label says to fit a chest of 42 inches or 107cm. 
Up to a size 18 would fit this DODF.
 
Pit to Pit - 59 stretching out to 65cm
Length - 75cm
Shoulders - 15cm
Sleeves - 74cm