what size is this pen?

​I hope the holiday season is treating everyone well and that you have acquired some wonderful new treasures.  I wrote the draft of this blog post with my newly acquired Wahl Eversharp circa 1929, a wonderful pen.  Another recent find is a beautiful Parker Duofold Senior in burgundy.  The Duofolds are a favorite of mine and I have been collecting them in various colors and sizes.  The senior burgundy has company, ie a Parker Duofold Junior in burgundy purchased a few years ago.  Somewhere along the way I found the smallest pen in the photo, also a burgundy.  The question is – what size is this pen considered?  I looked thru my copy of “Fountain Pens and Pencils” by George Fischler and Stuart Schneider.  From what I see it could be a Juniorette.  Or it could be a vest pocket Duofold.  What do you think?  Please chime in with your opinions.
Happy Collecting and Happy Holidays!