Change in breast size following implant removal
Since you only had the implants in place for a short period of time you should expect that the skin would recoil. There is no real way to know in advance how the skin will behave after implants are removed. The pressure of the implants will cause some degree of soft tissue atrophy.
Implant removal and breast size
If the implants were only in for a short time, it is likely that they will go back to a similar size as before. However sometimes with pressure over a long time, the breast tissue thins out a bit.
Where did the breast tissue go after implants
If your implants were in for only six months, chances are you will recover your original breast size. Over many years though the pressure of the implant can cause a thinning of the tissue and a smaller breast after removal.
Not uncommonly patients experience a loss of breast tissue and are smaller then preop when implants are removed. This can be due to weight change while the implants were in or just due to loss of volume due to the implants.