Bundles and Sew-Ins: How Much Hair You Actually Need

The most expensive mistake in this category is ordering one bundle, expecting something wearable, and receiving a single length of loose hair on a strip. Bundles are a component, not a finished product.

What a bundle actually is

A bundle is hair sewn onto a thin strip of fabric called a weft, then folded and tied. On its own it does nothing — a stylist sews it onto braided cornrows to build a full head of hair, or sews several onto a cap to make a wig.

Bundles are sold by weight, almost always 100g each, and by length. Two bundles of the same weight will look very different depending on length: 100g spread over 30 inches is noticeably thinner than 100g over 12 inches, because the same hair is stretched further.

How many you need

This is the number people get wrong. As a working guide for a full head:

• Up to 16": 2–3 bundles
• 18"–22": 3 bundles
• 24"–28": 3–4 bundles
• 30" and above: 4 bundles, sometimes more

Add a closure or frontal on top of that count — it covers the crown so no braids show, and it's what makes the parting look like it grows from your head.

If you're mixing lengths for a layered look (say 18", 20" and 22"), you generally need one bundle of each plus a closure. Buying all three the same length gives a blunter, heavier result.

Single drawn vs double drawn

In a single drawn bundle, strands are a range of lengths, so the hair is full at the top and tapers towards the ends — closer to how natural hair grows.

Double drawn has been sorted so most strands run close to the full length, giving noticeably thicker ends. It costs more, uses more hair, and is what you want if you dislike wispy ends. It can look slightly blunt if you don't layer it.

What a sew-in involves

1. Your own hair is braided into cornrows, flat against the scalp, in a pattern the stylist chooses based on how you want it to part.
2. Wefts are sewn onto the braids with a curved needle and thread, row by row from the nape upwards.
3. A closure or frontal is fitted last, covering the crown or the front hairline.

Budget three to five hours in the chair, plus the cost of the hair, which you usually buy separately. It typically lasts six to eight weeks before it needs taking down.

The honest trade-offs versus a wig

In favour of a sew-in: it doesn't move, you don't refit it daily, and a well-done install is very hard to detect.

Against: your own hair is under tension for weeks; washing and moisturising your scalp underneath is awkward; you can't take it off; and it needs a stylist to fit and to remove. Left in too long, tension at the hairline causes traction alopecia — and that damage can be permanent.

A glueless wig gives you most of the visual result with none of the tension, at the cost of putting it on each morning. For most people new to this, that's the better trade.

Before you order

• Check whether the listing is one bundle or a pack. Prices that look too good usually mean a single 100g bundle.
• Check whether a closure is included. Usually it isn't.
• Buy all your bundles at once, from the same seller. Hair from different batches can differ subtly in texture and tone, and it shows once installed.
• Talk to your stylist first. They'll tell you how many bundles they want for the look you're describing, and that beats any general guide including this one.

Caring for installed hair

Wash it in place with the hair hanging downwards, focusing shampoo on the scalp and braids underneath — that's where build-up causes itching. Conditioner goes on the lengths only. Dry it thoroughly, especially at the braids: damp hair trapped under wefts for days is how scalp problems start.

Have it taken down professionally, or at minimum cut the thread carefully rather than pulling wefts free. Most sew-in damage happens at removal, not during wear.