he looks absoloutly fine! imogen is 1 and she has a similar frame, she's 17lb 11 and has only just gone into 9-12 clothing. shes on 25th centile but has fluctuated from 50 to 9 then now 25 but HV's are happy with her. all babies are different, everyone i know has quite big babies and i worry some times looking at them compared to her but she eats loads, and is happy, never ill and progressing well with walking etc, shes just petite as is you LO. xxx