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Section off another 1 inch (2.5cm) section of hair, trimming the ends perpendicular to the strand just as before. Use the previous section as a guide for cutting the proper length. Continue trimming the ends all around your head, giving yourself an even cut. Have someone help you with the back of your head, if possible. Use a hair tie or clip to separate hair that needs to be trimmed from hair that has already been trimmed to avoid confusion.
Move to the next section of hair, repeating the process.