erm... i need to know what does ' shoes height' mean? from where to where? '

From the soles to the top of the shoe.

sooo... i can measure my school shoes for this?

It depends on what design your shoe is what. If you want to order thigh high boots, unless your school shoes are also thigh high, you cannot use your school shoes to measure!!!

like how high i want my boots to be up to?

...then what else did you think I mean?

Your shoe size is so that we know how long and how wide the shoes should be. The heel height is for us to know how much extra height you want the shoes to give you. What else can the "shoe height" ask for?

ok >.< sorry for being an idiot

Nah, I'd rather clear it up for you now than to have you give me the wrong measurements.