i too was huge with my pregnancy & measured 55inches the day i went in to be induced - i had a scan at 38 weeks & they said the baby was around 9lb give or take a pound - DD was 11lb 4oz - 5100grams - 57.5cms long - my brother was big 10lb 12oz & 26 inches long & my nephew (a third baby) was born exactly 3months after DD & weighed the same as my brother who was the babies uncle - if that makes sense!
forgot to say she has only hit 11kilos at 16months but it is 84cms tall