roller ball, spray and dropper dosage for

I have a bottle of Aqua Vitae with a roller ball (forgot to ask foe a dropper)
I used to use a lot of Androtics products and was used to the metered sprays for testing sweet spots. Does anyone have approximate dosages for roller ball (inches) versus a drop from a dropper versus a spray bottle from LAL.
I am struggling a little bit finding accurate dosages and any help would be greatly appreciated.

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