The measurement you see - such as 8" - is the entire length of the scissor, including the handle.
It depends on how often you use the scissors, what kind of material you’re cutting, and how well you take care of your scissors. When tested in the rigors of professional sewing studios, our scissors outperformed other brands in the same price tier.
Please note that all scissors will need to be sharpened at some point and that dullness is not considered a defect.
This is because we use put coating of oil on the blades to prevent any rust from developing during the shipping process. Please wipe off the oil before using the scissors. However, we do recommend that you apply a thin layer of oil - such as anti-rust, sewing machine oil, or any neutral oil - on the blades and button with a cloth when not in use.
See How Your Scissors are Made