Show actual image size inside Apple Mail Apple Mail offers the option to decrease or increase the size of an attached image. The options are "small", "medium" and "big".


  But how can I display the actual size in KB or MB?


I am using Mail 8.0 in OS X Yosemite.
Not certain for Yosemite, but on Mavericks it's on the left of the window, level with where you choose the image size to send