Application amounts
How much attar should I apply
Follow the directions of the specific attar rather than a generic drop count. Attar is used for different products in commerce, so the name alone does not establish concentration, carrier or the amount its applicator delivers.
A HUME Fragrance buying guide

Read the actual product
Check the maker and intended use before applying. Do not infer natural origin or alcohol absence from the attar name or a small vial.
Keep the application identifiable
Use the supplied method and note what you did. A dab-style product and another roller cannot be assumed to apply equal amounts.
Choose comfortable presence
Evaluate the fragrance in an appropriate setting before making changes. A strong first impression is not a reason to ignore product instructions or shared-space comfort.
Try this before you buy
Save the attar's exact directions and note the later impression from one separate application.