we offer our customers the finest in 100% Virgin human hair. I'm often asked how many bundles do I need to do a full head weave? It depends on the length of hair you purchase. Remember the shorter the hair the more weft you get and the longer the hair the less weft. Therefore, between the lengths of 10 to 16 you need 2 bundles, for 18 to 26 you need 3 bundles, and for 28 to 32 you need 4 bundles.