I got new feeding bras when ds was a couple of weeks old, was properly measured. After a month, I had that attractive udder effect going on, so was fitted with new bras, which fitted perfectly for a few weeks, and now, ds is 14 weeks, I seem to have gradually grown out of these now as well.
At what point can I safely buy new bras and know that they'll fit for longer than a few weeks?
(this is the 4th baby I've bf, and before I've stayed the same size throughout 
)