My question is regarding the size of the torn soul portions - are all the portions equal size? If yes how could it be? The soul doesn't know how many times it's going to be split.
There are two ways;
Halving : So on the first split, the soul divides into equal halves. One half in the Horcux and other half in the body. When the soul is split again, the half in the body divides equally (into quarters of the whole soul). The process repeats seven times. By the seventh time, the soul in the body (as well as the final Horcux) would be extremely small.
Problem: This would mean that the earlier Horcruxes are stronger than the later ones (because they have larger soul portions in them). However this doesn't seem to be the case - or is it?
Equal splitting: Voldemort made seven Horcruxes - if this theory is correct, each soul portion in the seven Horcruxes are of equal size.
Problem: But this doesn't seem to be plausible because how does the soul know how many times i'ts going to be split?