A classic full set is the initial application of single extensions to every suitable natural lash, creating a 1.5–2 hour, full, mascara-like look. A classic fill (or refill) is a 60–90 minute maintenance appointment every 2–3 weeks to replace shed extensions and keep the lashes looking fresh. Key Differences Purpose: A full set is a new, complete application. A fill is for maintenance to fix gaps and remove outgrown lashes. Time & Cost: Full sets take longer and cost more. Fills are quicker and less expensive. Frequency: Full sets are done initially. Fills are recommended every 2–3 weeks to maintain the look. Result: A full set provides maximum density for your natural lash count. A fill restores that density as natural lashes shed (2-5 per day). If you wait too long (4+ weeks) or have lost more than 50% of your extensions, you will likely need a full set again rather than a fill.
