The length of time that an eyebrow will last depends on the method used to shape them. For example, if you go for eyebrow threading, they will last for 2-3 weeks, while if you get them waxed, they will last for 4-6 weeks. If you choose to tint your eyebrows, the tint will last for 4-6 weeks. It's important to note that every individual's hair growth rate is different and so the time frame may vary.