When deciding on how many extensions for a full head, you need to take into account the current length and thickness of the natural hair, and the desired length.
For hair weaves
Usually you may need 3 bundles for a full head.According to the length you want,the detail quantity is as below:
For Clip in hair extensions
Usually 8 pcs is for a full head. If you want thicker hair, 16 pcs are recommend.
- The upper back of the head: 2pcs – 3clips
- The lower back of the head: 2pcs – 3clips
- The side of the head: 2pcs – 2clips
- The front of the head: 2pcs – 1clip
For other hair extensions like I tip hair
The average head needs about 100 to 120 strands of hair extensions to complete the process.
Sources and Citations