is this a lot of hair

oh god i just ordered from shrinkies. i ordered the 18 inch thermofibre hair in #9.which i hope is a medium brown i could not e-mail them.for some reason i am havig problems with my e-mail.but honestly i have been searching and searching for thermofibre and this is the only one with a good reputation.anyways is 100 grams sufficent for a whole head?and does any one know if color #9 is a medium brown?i think someone here said it was.just making sure.i cant really afford to be buying wrong colors etc.i need all the money i can find to fill up my car. thanx guys

I'm not sure if 100 gr will be enough to do a full head; I doubt it. I would say you should have at leave 113 grams or more, BUT I don't know what Thermofibre is like so I can't really say. It might be pretty thick, so you may not need as much as human hair. I hope it works out for you.