Comb twists typically require a minimum hair length of about 2-3 inches, though longer hair (4+ inches) makes the process easier and creates more stable, defined twists. The exact requirement depends on hair texture and thickness—coarser, thicker hair may need slightly more length to grip and hold the twist pattern, while finer hair might work with the minimum length but will be more delicate. Hair should also have enough texture or curl pattern to hold the twist; very straight hair may struggle to maintain the style even at longer lengths. For best results, most stylists recommend waiting until hair reaches at least 3-4 inches before attempting comb twists, as this provides sufficient length to work with and ensures the twists will hold their shape for a reasonable duration. The style typically lasts 2-8 weeks depending on hair care, maintenance, and how well your specific hair texture retains the pattern.