I'm so heavy handed when it comes to hair products. I'm still learning to take it easy, especially w/ oil. My hair is between waist and hip length and I apply approx. a quarter size amount and go from there. If I need more then, I'll use it.
Well I have fine-textured hair and I use about a dime-sized amount or even less, the texture of my hair is very close to mizanimami. If I put too much oil in my hair it will weigh it down with the quickness.
My hair is close to waist length and can't take too much oil when straight so I use about 4 drops throughout hair and a drop extra on my ends. I make sure to evenly distribute it through my hair w/ a fine tooth comb.
My hair is thick and porous so it quickly absorbs any product I put on it. I use TONS of oil--about a dime sized amount for each section I part while rollersetting (usually about eight sections) and for daily maintence about two quarter size amount combined for the ends, nape and hairline.
My length is armpit.