I just went down to the basement and measured 7 different silca pumps:

4 "framefit" pumps between 51mm and 57mm uncompressed - All of them would compress about 50 mm.
1 "framefit" pump around 44mm uncompressed- Compressed about 40mm. *
1 old style (highly textured non-framefit handle with 4 "silca" logos around the handle) 53mm uncompressed - Compressed about 35mm.
1 old style 43mm uncompressed - Compressed bout 35mm.

*note: the 44mm framefit pump had a handle that was about 95mm long: All the other, longer, pumps had handles around 115mm long.

Brent