Please see below for each i-Mount model's measurements and weight.
i-Mount Mini: 8" L / 12" W / 1.3" Deep / .8lbs.
i-Mount 10.5: 9" L / 14" W / 1.5" Deep / 1.3 lbs.
i-Mount 11: 9" L / 13" W / 1" Deep / 1 lbs.