The number of packages you need depends on your hair type and your desired result: For added volume/density only: 50g (2-3 packages) For length on fine hair: 100-150g (4-6 packages) For length on medium hair: 125-175g (5-7 packages) For length on thick hair: 200-250g (8-10 packages) If you're unsure, we recommend consulting with your stylist to determine the best amount for your hair goals!