How Many Bundles Do You Need for a Full Head? (With Length Chart)
Three bundles covers a full head for most people between 16 and 22 inches. Two is plenty under 14 inches, or with a closure on a smaller head. Four once you pass 24 inches. Plan on $180 to $500 for the hair, plus $150 to $350 for the install here in Atlanta.
The length chart
Start here, then adjust for your own head.
|
Length
|
4x4 closure install
|
13x4 frontal install
|
Leave-out install
|
Total hair on your head
|
|---|---|---|---|---|
|
10-14"
|
2
|
2
|
2
|
190-200 g
|
|
16-18"
|
3
|
2-3
|
3
|
285-300 g
|
|
20-22"
|
3
|
3
|
3
|
285-300 g
|
|
24-26"
|
4
|
3-4
|
4
|
380-400 g
|
|
28-30"
|
4
|
4
|
4-5
|
400-500 g
|
A 4x4 closure covers about 16 square inches of your crown. A 13x4 frontal covers closer to 52. More lace, less weft, which is why frontal installs sometimes come in half a bundle lighter at the same length. Half a bundle. Not a whole one, whatever the product page claims.
Leave-out installs land at the top of the range because you're sewing tracks right up to the leave-out line, and any thin patch there shows the second you flip your part.
Why longer hair eats more bundles
Every bundle weighs 95 to 100 grams no matter how long it is. Most people miss that.
Spread 100 grams across 12-inch strands, then spread the same 100 grams across 28-inch strands. Your second bundle has roughly half the strand count. Same weight in the bag, half the coverage on your head. Long and full costs double, and there's no shortcut around the math.
Single-drawn hair widens the gap. In a single-drawn 24-inch bundle, maybe 40 percent of strands actually reach 24 inches, and the rest sit between 16 and 20. Pretty taper. Thin ends. Double-drawn solves the ends and adds 40 to 70 percent to your bill.
What else changes your count
Head circumference comes first. Anything above 23 inches around and you should add a bundle at every length in the chart, because the same wefts have to stretch across more scalp and you'll finish with visible gaps at the sides.
Your own density counts too. Fine 4A hair under a sew-in makes the install look thinner overall, especially in a leave-out, since you're blending 60 grams of your own hair with 300 grams of weft. Denser 4C hair with a solid braid pattern gives you a base that hides tracks better.
Then there's the look you're going for. A blunt, glassy bob at 12 inches needs weight at the ends, so run 3 bundles even though the chart says 2. Layered body wave at 20 inches can get away with 3 because the layers hide the density drop. Straight hair shows everything. Wave and curl forgive.
One more variable nobody mentions: how much you cut. Stylists routinely trim 1 to 2 inches off the top of a 22-inch install to layer it, and that trimmed hair is gone. Buy for the length you want after the cut.
How the money actually adds up
|
Install type
|
Hair cost
|
Closure or frontal
|
Atlanta labor (2026)
|
Total
|
|---|---|---|---|---|
|
3 bundles, 16", 4x4 closure
|
$$210$$315
|
$$60$$120
|
$$150$$250
|
$$420$$685
|
|
3 bundles, 20", 13x4 frontal
|
$$270$$405
|
$$110$$220
|
$$200$$350
|
$$580$$975
|
|
4 bundles, 26", frontal, colored
|
$$480$$720
|
$$130$$260
|
$$250$$400
|
$$860$$1,380
|
Something our Atlanta customers work out around their second install: buy the spare bundle even if you only sew in three. Wefts get cut into six or seven pieces, trimmed at the ear, and occasionally chewed up at takedown. Having a backup from the same batch means your reinstall at week nine matches week one exactly. A spare 20-inch bundle runs about $110 and saves you a full reorder that won't match anyway.
Two bundles of good hair beats three bundles of cheap hair. We watch people spend $150 on four $38 bundles, get six weeks out of them, then buy again in November. Two bundles at $90 apiece and one extra later, if you need it, ends up cheaper by spring.
Mistakes That Cost You Money
Ordering two bundles at 24 inches to save $90. You'll get a sparse install with see-through ends, and adding a matching bundle three weeks later almost never matches. Buy the third one upfront.
Assuming a frontal means fewer bundles at every length. Frontals cover the front, not the back. Below 18 inches you might save half a bundle. Past 24 you save nothing.
Ignoring your head circumference. Measure it with a soft tape before you order. Above 23 inches, add one bundle to whatever the chart says.
Buying by inches on the package instead of stretched inches. Curly bundles are measured stretched. A 20-inch deep wave bundle hangs at roughly 14 to 15 inches once it dries and shrinks up.
Mixing a leftover bundle from last install. Old hair sits at a different porosity and takes color differently. It'll dry rougher than the new bundles and everyone will see the difference on wash day.
Where Riverwood Fits
We sell bundles in single- and double-drawn, plus closures and frontals to match, through our site, TikTok Shop, Amazon, and Temu. Customers who aren't sure how many bundles they need usually text us their length and head measurement first. Walk-ins to the Atlanta store can lay wefts against their own hair before buying. Full range at https://www.riverwoodfashion.com/.
FAQ
Is 3 bundles enough for a full sew-in? Yes, for most heads between 16 and 22 inches. Add a fourth if your head measures over 23 inches around or you want a blunt, heavy look.
Do I need a closure and 3 bundles, or does the closure replace one? A 4x4 closure replaces roughly half a bundle of coverage. Order 3 bundles plus the closure at 18 inches and up.
How many bundles for a 30-inch install? Four minimum, five if you want the ends to look full. At 30 inches you're working with maybe 55 percent of the strand count you'd get in a 14-inch bundle.
Can I use 2 bundles and a wig cap for a partial sew-in? Yes. A half head or U-part install with 2 bundles at 14 to 18 inches works fine, and it's the cheapest way to test a texture before you commit to a full head.
Should all my bundles be the same length? No. Buying 18/20/22 and layering gives movement that a single length can't. Order the shortest bundle for the nape and work up.
How much hair is 300 grams? Three standard bundles. Roughly the weight of a can of soda sitting on your head, spread across 20 to 30 tracks.
Bottom Line
Order three bundles from one batch, measure your head before you check out, and add a fourth past 24 inches instead of stretching three. Buy for the length you want after your stylist cuts it, not the number printed on the bag.