Wear-time comparisons
How long do perfume samples last on skin
A perfume sample has no separate duration category simply because its container is small. The fragrance and application matter, and a sample atomizer may deliver a different amount from a full bottle.
A HUME Fragrance buying guide

Confirm the exact fragrance
Match sample name, version and maker with the product you may buy later. A decant or similarly named interpretation should not be assumed identical.
Record the applicator
Equal spray counts from different containers do not prove equal quantities. Keep the test described honestly rather than claiming laboratory-equivalent dosing.
Retest the favorite
A separate second wear can show whether your later enjoyment is consistent. Use samples to learn preference, not to assign a universal performance result to every bottle.
Try this before you buy
Save the sample's exact name and application details beside every later-wear observation.