I have been searching for a smaller size expression pedal and came across this:
http://www.effectsdatabase.com/model/hotone/skyline/soulpress
look promising!! it's abit longer than the AMT EX50(which is nice), I wonder if I can modify the toe switch to make it as a external switch for my midi controller.....
I really hope there's more smaller size expression pedal in the market, I couldn't find one that's 6-7 inches long and made of metal(rather than plastic)