Hair Extension Guide
How many packs of hair extensions do you need? Every head is different, and your stylist has the final say. These are the amounts we see work most often, grouped by what you want to achieve, plus what is in each pack so the numbers make sense.
How much hair do I need
Adding fullness, not length
About 40 to 60 grams of hair. That is 2 to 3 packs of Individuals or Invisible Tape, or one Genius Weft.
Adding length
Adding length means doubling the density of your natural hair so the ends blend. Most clients use 4 to 8 packs of Individuals, 4 to 6 packs of Invisible Tape, or 2 to 3 Genius Wefts, depending on how thick your hair is to start.
A full transformation
Going from a bob to long, or a big change in both length and volume, usually takes 8 to 12 packs of Individuals, 6 to 8 packs of Invisible Tape, or 3 to 4 Genius Wefts.
By your hair, at a glance
| Your natural hair | Fullness only | Add length | Full transformation |
|---|---|---|---|
| Fine | 2 packs Individuals or Tape, or 1 Genius WeftHybrid: 1 weft + 1 pack Individuals | 4 to 5 packs Individuals, 4 Tape, or 2 Genius WeftHybrid: 1 weft + 2 packs Individuals | 8 packs Individuals, 6 Tape, or 3 Genius WeftHybrid: 2 wefts + 2 packs Individuals |
| Medium | 2 to 3 packs Individuals or Tape, or 1 Genius WeftHybrid: 1 weft + 1 pack Individuals | 6 packs Individuals, 5 Tape, or 2 to 3 Genius WeftHybrid: 2 wefts + 1 to 2 packs Individuals | 10 packs Individuals, 7 Tape, or 3 to 4 Genius WeftHybrid: 3 wefts + 2 packs Individuals |
| Thick | 3 packs Individuals or Tape, or 1 to 2 Genius WeftHybrid: 1 weft + 2 packs Individuals | 8 packs Individuals, 6 Tape, or 3 Genius WeftHybrid: 2 wefts + 2 to 3 packs Individuals | 12 packs Individuals, 8 Tape, or 4 Genius WeftHybrid: 3 wefts + 3 to 4 packs Individuals |
These are planning numbers for a standard length and a full head, not a prescription. Shorter cuts and partial placements need less, and your stylist decides the final amount after seeing your hair. When in doubt, order one pack more than you think and keep it sealed: unopened hair can be exchanged within 14 days.
What is in a pack
| Method | Lengths | Per pack | Weight |
|---|---|---|---|
| Individuals Straight | 18", 22" | 20 strands | 18 g at 18" (0.9 g a strand), 20 g at 22" (1 g a strand) |
| Individuals Wavy | 18", 22" | 20 strands | 18 g at 18", 20 g at 22" |
| Invisible Tape Hair | 18", 22" | 12 pieces | 25 g at 18", 27 g at 22" |
| Genius Weft Straight | 20", 24" | 1 piece, 90 cm wide | 50 g at 20", 70 g at 24" |
| Genius Weft Wavy | 24" | 3 pieces, 30 cm wide each | 60 g total |
| Clip In Hair | 18" | 7 pieces plus a tester piece | 90 g total |
Grams are the honest way to compare methods. "40 to 60 grams for fullness" is two to three packs of Individuals or Tape, or a single Genius Weft, which is where the ranges above come from. A Genius Weft can be cut at any point without unraveling, so one piece can be split across rows.
Which method is right for me
Individuals
Small strands bonded one at a time with Italian keratin. The most customizable placement and the most natural movement. Lasts up to about three months per install before a move up. Best for fine hair and for blending around the face.
Invisible Tape
Thin, flexible tabs with a hand injected membrane, so there are no visible tape lines even on fine partings and updos. Fast to install and gentle, moved up every 6 to 8 weeks. Best for a quick service and a flat finish.
Genius Weft
An ultra thin, ultra flat micro weft that can be cut to any size. A modern alternative to hand tied wefts for fullness, length, or both. Fewer attachment points, so it suits medium to thick hair and clients who want volume fast.
Clip In
Instant length and volume at home, no salon appointment. Seven pieces plus a tester piece so you can check the shade first. Clip ins cannot be exchanged once the full set is opened, so match with the tester before you unwrap the rest.
Hybrid
Our signature method mixes Genius Weft rows with Individuals around the hairline. It is what most of our classes teach, and it can be customized for any client.
Lengths
18" sits around the bra line on most clients. 22" reaches mid back. 24" Genius Weft is our longest piece. Measure from around mid-ear, not from the top of the head or the nape.
Choosing a shade
- Match to the ends of your hair, not the roots. Rooted shades take care of regrowth.
- Unsure between two shades? Order the Color Book before a first order, or use Color Match to see real client matches.
- Shades ending in F, like 15F, 20F, 22F, 35F, and 45F, are fine blends of the same color family with a softer blend between highs and lows.
- Not every shade comes in every method or length. The product page shows what is available.
Caring for your extensions
- The full routine is in How to care for your extensions, the LINEONE way.
- Sulfate free, extension safe products only. The LINEONE care line is made for this.
- Brush from the ends up while holding the roots. Sleep in a loose braid.
- Swimming and workouts are fine with care. Loosely braid your hair, wet it with water before getting in a chlorinated pool, wash and dry soon after, and keep it away from chlorine and chemical sunscreen.
- Wavy hair: squeeze water out with a towel instead of rubbing, scrunch in Weightless Detangler as a leave in, then air dry or diffuse on low. Brush your hair before hopping in the shower to wash, to prevent excess tension on the scalp.
Still not sure how much to order?
Email orders@lineonehair.com with a photo of your hair and what you are going for, and we will tell you exactly what to order. Or send it through the contact form.
