As few as possible, but that may be up to 9. 3 on each side, bangs and 2 in the back. Usually it's one or 2 on top, depending on if I need a part, one one each side, one in the back and bangs. The 2 things to keep in mind with the groups is hair matching seams, for lack of a better term, between groups can be difficult and cause parts where you don't want them and drastic changes in hair lengths in the same group cause the hair in between to be very strange.

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