Hair is measured straight, from the weft to the tip. That matters, because a curl pattern always wears shorter than it measures — a 20" deep wave sits closer to where a 17" straight would.
Where each length falls
| Length | Straight | Wavy or curly |
|---|---|---|
| 12" | Chin | Jaw |
| 14" | Collarbone | Chin |
| 16" | Shoulder | Collarbone |
| 18" | Just below shoulder | Shoulder |
| 20" | Mid-back | Below shoulder |
| 22" | Mid-back | Mid-back |
| 26" | Waist | Mid-back |
| 30" | Hip | Waist |
Heights differ, so treat this as a guide rather than a promise. If you're petite, everything sits about two inches lower than the table says.
How many bundles?
- One bundle — a partial install, or a short length up to 14".
- Two bundles — a standard full sew-in between 14" and 20".
- Three bundles — anything past 20", or if you want real volume. Longer hair needs more to avoid looking thin at the ends.
Not sure? Send us a photo of the look you're going for and we'll tell you exactly what to buy.