If a handle is chubby, not too light and grippy, I'm fine with a shorter handle, but my preference is a handle between 9 and 10 cms, thick, knurly, with some depressions in at least three places, if that can be had.
It has a lot to do with my shaving technique.
My current favourites are:
- ixGrip
- the knurled handle with small depressed rings that came with my Rocnel SE-P OC (better knurling than the safety bar version)
- a Hawk DE safety razor handle:
http://www.ebay.co.uk/itm/DE-DOUBLE...ER-RASOIO-BLADES-IN-TRAVEL-CASE-/162076326353