Lash thickness (also called lash diameter) refers to how thick each individual lash extension fiber is — and it makes a huge difference in weight, retention, and overall look.
Here’s a clean, pro-approved breakdown 👇
📏 Common Lash Thickness Sizes (mm)
0.03 – 0.05 mm
- Ultra-fine
- Used for Mega Volume
- Very lightweight, soft, fluffy
- Requires advanced technique
0.06 – 0.07 mm
- Volume standard
- Great for 2D–5D volume fans
- Balanced fullness + safety
- Most popular for everyday volume sets
0.10 mm
- Light classic
- Natural look
- Good for weak or fine natural lashes
0.12 mm
- Standard classic
- Noticeable but not heavy
- Good retention when applied correctly
0.15 mm
- Bold classic
- Darker, more dramatic
- Not recommended for weak natural lashes
0.18 – 0.20 mm
- Very thick / heavy
- Dramatic strip-lash effect
- Rarely recommended by professionals (risk of damage)
👁️ How Pros Choose Lash Thickness
| Desired Look | Recommended Thickness |
|---|---|
| Natural / Wispy | 0.10 – 0.12 |
| Classic Set | 0.12 – 0.15 |
| Hybrid | 0.07 + 0.12 |
| Volume | 0.05 – 0.07 |
| Mega Volume | 0.03 – 0.05 |
⚠️ Pro Safety Rule (Very Important)
Thicker ≠ better
- Thicker lashes = heavier = more stress on natural lashes
- Volume lashes look fuller because of fan width, not thickness
- For lash health, pros prefer multiple thin lashes over one thick lash
💡 Quick Pro Tips
- A 0.07 mm volume fan (4D) ≈ weight of one 0.15 mm classic lash
- If a client wants “darker,” increase density or fan count, not thickness
- Always match thickness to natural lash strength
If you want, tell me:
- classic / hybrid / volume?
- natural or dramatic?
- client lashes strong or weak?
I can give you a perfect thickness combo for that set 😉