Ooh this is interesting was wondering about this just today as one of my twin girls had her latest hospital appointment today and was weighed.
Born @ 31 weeks - twin1: 3lb 7 & twin2: 3lb 14
Now 22 months - twin1: 20lbs & twin2: 22lbs
They both eat ALOT lol! But twin 1 doesn't sit still, very active all the time and looks tiny bless her, twin 2 very laid back and quite lazy xx