Well, I bought 2 from Russell Ind. after emailing a sales rep.
I asked him the measurements on one of their antenna models and he told me it has a collapsed length of 9.8" (tip to tip).
Mine is 9-7/8" which sounds perfect so I called him up and ordered two.
I received them and they were 9-3/8", a pretty big difference.
An eighth of an inch off I can see but a half, c'mon.
I ended up using two I previously bought from the seller I mentioned above, CQ radio supply, that are about 10-3/8".
They're a little long but they collapse and clip in easier than the shorter ones.