I remember one day when I was out at Treasure Lake, two children with Poland syndrome came in, one baby just five months old and another baby two years old. The two-year-old baby was a little older and had bigger hands, so the difference between the two hands looked more obvious. Can the problem of small and large hands be solved after Poland syndrome and finger splitting? Will the hands continue to grow? Parents hope that after the surgery, the affected hand will grow as big as a normal hand, but this is actually very unlikely and cannot be achieved with the means available to us. Although it is difficult to solve the problem of small and large hands, after the finger merging and finger splitting, the function of the child’s hand will be greatly improved, the flexibility is good, and the strength is also possible, so the child can do many things with the hand after the operation, and the hand can grow a little bigger through the strength stimulation. Parents should not expect too much from the Polish syndrome hand size, but they should not be too disappointed either, because we see many children with Polish syndrome whose two hands work very well together and their life and study are basically rarely affected, so parents should not worry too much.