Buying Hair Guide
If you're getting Non Sewn Beaded Wefts (NSBW) you'll be shopping for weft/track hair. You'll want to get Machine Weft Hair, Seamless Hair Wefts, or Genius Wefts. Do not get hand tied wefts, they unravel too easily.
Quantity: A full pack, 3 ounces, or 150 grams is usually enough for a full head (three tracks doubled).
If you have thicker hair, buy 1 1/2 packs, 3.5-4 ounces, or 200 grams (four tracks doubled).
Quantity: 125-150 strands is considered a full head, but if you have thicker hair, it is recommended that you get 150 to 200 strands.