started a thread ages ago about this, whether it was a 'problem' - he is the smallest in his class (i reckon, looking at the line in the morning) and is fairly 'cute' (glasses, curls) so adding to the small appearance. (yr 2, about 111 cm, summer baby so actually 6yrs, 3 mths)
he has started mentioning other children saying he should be in Year R, etc and commenting on him being small and little - i know all kids point out differences so hey ho. He also appears to think his class teacher whispered to the ta that 'that boy is a baby' about him 
school nurse? parents evening? want to avoid gp if necc - long wait, been loads for ds1 (valid but ongoing) don't want to look silly, etc etc.