The unit you should use to measure the thin edge of a dime would be millimeters.
Newtons.
foot
Meters if you're using the metric system. Otherwise use feet.
Centimetre.
kilograms
inches or centimeters
millimetres or centimetres.
I would use a centimetre to measure the length of a boy. Not sure what a boy yard is, though.
The liter.
millileter (ml) should be appropriate for that.
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.