55-60 lashes are applied per eye. 2.5 to 3 weeks is an average time between infills for these sets. These sets are in the middle of Classic extensions and are a nice balance between natural and glamorous. If you are unsure of what look exactly you want to achieve for your first time, it is a good idea to start on the Silver set and infill next time to either the Bronze set (for a less full and more natural look) or the Gold set (for a more full look).