When clients want bold, defined, and unforgettable — this is the one. 0.20mm ellipse flat lash extensions — the boldest classic flat lash. A mascara-like lash line with a flat ellipse base for superior retention, delivering maximum definition in a single 1:1 application. Why You'll Love It Maximum classic drama — 0.20mm flat lash extensions deliver the boldest, most defined lash line possible without volume fans Flat ellipse base for stronger bond — wider contact surface creates superior adhesive grip and a liner-like root effect that round classics can't match Same technique as round classics — no new skills required, just dramatically bolder flat lash results from day one Deep matte black PBT fiber — rich, consistent pigment that holds through events, photoshoots, and special occasions Key Features Flat ellipse base — stronger adhesive bond and darker root effect than round classic lashes 0.20mm thickness — maximum classic drama for bold lash sets Premium PBT synthetic fiber — deep matte black, holds curl shape long-term Available in 4 curls: C, CC, D, DD Lengths from 8mm to 15mm, including 8–15mm mix trays for lash mapping Classic 1:1 application — one flat lash extension per natural lash FDA & CE certified — safe for professional salon use Cruelty-free, vegan lash extension materials Best For Clients with strong, healthy natural lashes who want maximum classic volume Special occasions — weddings, events, photoshoots requiring bold lash definition Clients who love a bold, defined lash line without a volume lash set Lash artists offering a dramatic classic flat lash upgrade Specifications Base Shape Flat Ellipse Thickness 0.20mm Material Premium PBT Synthetic Fiber Available Curls C, CC, D, DD Available Lengths 8mm – 15mm (incl. 8–15mm mix trays) Finish Deep Matte Black Certifications FDA & CE Certified, Cruelty-Free Compare Options — Flat Lash Extension Thickness Guide Thickness Effect Best For Skill Level 0.10mm Flat Ultra-natural, featherlight Fine or weak lashes, first-time clients All levels 0.15mm Flat Classic volume — most popular flat lash Most clients, everyday classic sets Beginner+ 0.20mm Flat — You are here Bold, dramatic lash line Strong lashes, special occasions All levels How To Use Prep — Cleanse natural lashes with Eyelash Primer to remove oils and maximize flat lash extension adhesion Isolate — Use precision tweezers to isolate one natural lash before applying the flat lash extension Pick up — Grip a single 0.20mm flat lash extension; the ellipse base faces down toward the natural lash Dip — Dip the base into 0.5s Lash Glue — use minimal adhesive for a clean, precise bond Apply — Place 0.5–1mm from the lash line, flat base flush against the natural lash, hold for 2–3 seconds Cure — Use a nano mister to cure and seal the lash adhesive for maximum retention Related Guides Flat Lashes vs Classic Lashes: Which Should You Use? Best Lashes for Hooded Eyes: Find Your Match Sensitive Glue vs Fast Dry Glue: Which Lash Adhesive Should You Use? Complete Your Classic Lash Kit 0.5s Lash Glue — Fast-bonding professional lash adhesive for classic and flat lash sets Eyelash Primer — Prep natural lashes for maximum flat lash extension retention Flat Lash 0.15mm — Step down for everyday classic flat lash wear Lash Shampoo — Oil-free cleanser for lash extension aftercare FAQ What makes 0.20mm flat lash extensions different from 0.15mm? 0.20mm flat lash extensions are thicker and heavier, delivering a bolder, more dramatic lash line than 0.15mm. They're best suited for clients with strong, healthy natural lashes who want maximum classic definition — for special occasions, events, or photoshoots. For everyday wear, 0.15mm flat lash extensions are the more versatile choice. Is 0.20mm flat lash too heavy for natural lashes? 0.20mm flat lash extensions are best suited for clients with strong, healthy natural lashes. For fine or weak lashes, use 0.10mm Flat or 0.15mm Flat instead to avoid putting excess weight on fragile natural lashes. Can I use 0.20mm flat lashes for volume sets? No — 0.20mm flat lash extensions are designed for classic 1:1 application only. For volume lash sets, use Easy Fanning Lashes 0.07mm to create lightweight 2D–6D fans. Do 0.20mm flat lashes apply the same way as round classic lashes? Yes — same technique, same lash adhesive. The flat ellipse base provides more contact surface for a stronger bond and a darker root effect. No new skills required for lash artists already working with classic lashes. Which curl gives the most dramatic effect with 0.20mm flat lashes? DD curl at 0.20mm creates the most dramatic open-eye, bold lash look. D curl is slightly more wearable for everyday drama, while CC offers a strong lift that works well for clients with downward-pointing natural lashes.