Its depends on the nail growth. I find if you want it to last longer on a client, then you file the toe nail quite short and exagerate the smile line. The will allow the nail to grow longer and give the client longer out of the application. But from a business point of view to maximize profit you can leave the nail at the normal length and allow the client to come back every 4 -6 weeks.
I find if you leave the nail too long from the onset, it won't be too long when the client will be feeling discomfort as the nail will be getting too long (i.e. for inside shoes).
Definately, when doing my own I file very short and I could have them for 8 weeks plus and they still look great!:Love: