How long does it take to grow out Frankie sandford's hair style?

Well I have that & my right side is like maybe 1/2 inch below my ear and my left is to my chin. It really hasn't grow in the 3 or 4 weeks ive had it. But since most hair grows a 1/2 inch each month, it depends on how long u want it. I'm growing mine to shoulder length but first a bob to even it off. I'm going to be taking the hair skin and nail vitamins to help all 3 grow! The reviews are very good so I'd reccomend it!