How Much Hair Do I Need

How Many Bundles Do I Need for a Full Sew In

The number of sew-in hair extensions you need comes down to length. Shorter installs from 8 to 14 inches typically take two bundles, and lengths from 16 to 22 inches need three. Past 22 inches, plan on four bundles because each one covers a smaller area as the hair gets longer. The calculator above handles lengths from 8 to 34 inches.

Can I Add an Extra Bundle for Fullness?

Yes. One bundle weighs roughly 100 grams, and that alone will not cover your whole head. Most full sew in installs start at two bundles, and you can add one for extra density. The calculator caps at five total.

Should I Buy a Closure with My Bundles?

A closure shields the parting area and crown, so you can stay at the lower end of the bundle range. A frontal runs along your whole hairline. You buy either piece on top of your sew in bundles. The same bundle count works for a wig build too, and you add a closure or frontal for the base.

Does the Type of Bundle Change How Many I Need?

No. The type of bundle changes your look but not how many you need. Curly, body wave, and straight hair extensions all take the same number for a given length. A 3 bundle sew in at 18 inches needs the same count in any texture, so choose the pattern you like and let length set the number. Our Hair Length Calculator shows how each option looks before you buy.