What is the average saline fill for a chest expander? I had bilateral total mastectomy for breast cancer. I was a b cup prior.

Saline tissue expanders come in all sizes and can go up to 800cc.  Saline expansions done in the weeks after surgery depend on how much a patient can tolerate.  A typical fill in our clinic is 60-120 cc per breast, sometimes it can be more.  Sometimes (esp in radiated patients) when the tissues are very tight, less filling is done per visit

The average size of tissue expanders depends on the patient's chest width. The average weekly fill is about 50 cc. 

There are many different tissue expanders for fill of various different sizes.  It really depends upon your anatomy and the size of your breasts that were removed.