For those with Thin Hair: You'll find that 100 grams are sufficient to achieve a full head look, while 50 grams are perfect for creating a highlight color effect. For those with Thick Hair: If you have thick hair, it's recommended to use 150 to 200 grams to achieve a full head appearance. Helpful Tip: Please note that the weight of the hair extensions remains consistent from 14 inches to 24 inches in length. However, as the hair gets longer, it tends to be thinner in volume. Therefore, if you have long hair, it's advisable to opt for more hair extensions to achieve your desired style.