My second daughter has a strange history. She was born 2.62 kg (5.8 lbs) so she was under the lowest weight on the chart. M/A by 3 months she was on 50 percentile and by 1 year she was just under 90 percentile. But heres the thing she never actually looked very chubby. It was her height that brought her weight up. By 12 months she was above the height chart (81 cm)...and has remained off the percentile chart ever since. People never believe she is 4. Age 6 clothes fit her.