How to Cut Bangs in Long Hair. Adding bangs to long hair adds character and dimension to the hairstyle and learning to cut the hair at home saves time and money.
Wash hair with products you normally use, but do not condition the bang area so it doesn't get too soft and more difficult to cut. Towel dry and then blow dry the hair to prepare it for a dry cut.
Comb through the hair removing any tangles. Apply anti-frizz serum such as shining products from Pantene and John Frieda. Part the hair so you can clip the non-bang hair away from the soon-to-be bangs.
Separate the bangs into three sections and clip the two outside sections with a barrette away from the middle section. Hold this section between the index and middle fingers to form a smooth even line.
Cut the hair slowly using sharp scissors with a maximum blade length of about 6 1/2 inches. Start at the tip of the nose and cut across from left to right and then from right to left. Comb or brush the hair to check the length.
Trim about 1/4 inch more if the length is still too long. Once you have reached the desired length, unclip the side bang sections. Cut these sections using the middle section as a guide. Comb all sections of the bangs, check for unevenness, and trim where necessary.