
Good response, Tam Tam. Due to weight and muscle-loss one imagines her feet shrink. The bones don't but yes, what's around them usually does. Perhaps up to a size, but I imagine about a half-size may be more frequent.
The size guess is based entirely on reading what other people have said they have experienced through the years and my own size-decrease.

So it's definitely a YMMV matter and purely anecdotal for the amount of decrease. The tissue loss, however is gonna happen. The variable will be how much is lost.
Ya might wanna wait on ten pair at once, just in case you don't get what you think may be average.
Nichole