20 Inch Hair Extensions: How Long Are They Really?
Updated 2026-09-25. By Devan, hair extension specialist.
20 inch hair extensions usually fall around the bra strap to mid back on an average height woman, because the length is measured from the attachment point, not your scalp. For full ends at 20 inches most people need 2 packs of tape-ins or 150g of weft.
Where do different lengths fall?
Approximate finish on an average height adult:
| Length | Where it falls |
|---|---|
| 16 in | Shoulder to collarbone |
| 18 in | Below the shoulder blades |
| 20 in | Bra strap to mid back |
| 22 in | Mid back |
| 24 in | Lower back |
Questions
What is the most popular length?
18 and 20 inches are the most requested lengths for a natural result.