Jeremy Bulloch is about 6 foot and although Boba is an unaltered clone of Jango, that doesn't mean Jango couldn't have given him growth hormones or fed him better to ensure he grew taller. Besides, a little height difference for a minor character shouldn't determine who you cast. Temuera is PERFECT for the role of Jango (or Boba for that matter).
I intend to have a fullsize Boba Fett mannequin standing next to a full size Jango Fett mannequin.
For Boba Fett it was easy since Jerremy Bulloch was quite slim and a standard shop mannequin is about 6' tall, 38" chest, 32" waist.
I had intended to make my Boba and Jango the same size and use the same sized mannequins. Having them both side by side the same size would probably look best.
Its going to be near impossible to find a 5'7" mannequin and Jango will look like a dwarf next to his son!
I'm 5'7"....so is Tem Morrison.........btw he's recovering from the m/c accident..leg broken but,he's ok.......Tem looks bigger than he really is due to his "prescence".......he's a funny guy..........lotsa personality.........
here is some food for thought on the issue of boba and jango. boba was an unalterred clone. this means he is his own person. now i am an identical twin. my twin brother is a little taller than i am. so the whole issue of casting the right size person is irrelevant. keep in mind that all though they are clones, each has there own make up. genetics 101. mutations, call it what you will.