Just curious, because I find this really weird. LO is 6 months old and I had him weighed today. He's 18lbs 7oz so not a small baby by any means. I haven't had his length done for a while, but he's pretty tall. He's only just went in to 3-6 month clothes in the last 2-3 weeks! Granted, all his clothes, including vests and sleep suits, are from next and they are slightly big made. However, my friend's LO is exactly one week older than my LO, weighs 18lbs exactly and about the same height and he's now in 6-9 month clothes and also wears mostly next. I just find it really strange that my baby is between the 50th and 75th centile for weight but there is no way he'll be in 6-9 for a good 6-8 weeks yet.