You mean Holmes grove up significantly after his 30 birthday .... or is Haye still going to add a few inches and reach Valuev's size in a 5 years?
Haye is the prototypical size of heavyweights from the late 60`s up to the 90`s. Its only recently that so many of them have been so large. Either way his not a natural heavy. There was a time when Haye made 190lbs with no problem. Although he weighed 215 for Barrett his not a natural heavy in the truest sense of the word nor did he grow into that weight. Haye probably walks around at around 215. In that respect if he is struggling to make weight then it makes sense for him to move up. In my opinion though he wasn't as he never liked doing roadwork and is now 25lbs removed from 190 which is quite a difference.
haye is a fit and healthy 220lbs. most heavys are unhealthy and unfit 240lbs. guys like brewster, barret, ibragimov, peter would be less than 200lbs if they were fit.