imo and my opinion means next to nothing when it comes to this, but I think I still see pistils. They should retract back into the buds and also look at the buds with a microscope 30x or so and take a look at the trichromes. they should look like itty bitty mushrooms, stalks with little round tops on them and they should start to get cloudy looking, not completely clear and some of them should start turning an amber color. At that point, chop them down! hope this helps and was at least half way accurate.
as all above....buddy Hairs should be amber but the biggest indicator is the Trichs under 30x/60x scope....plants look good healthy and will yield well so dont waste the good work so far.....let them mature you oculd be looking 2 weeks but hairs and trichs are the only way to tell when to harvest.....read up buddy
They look great but they are a little young. Have you done you do diligence? Proper light cycle? Flush? If there is no need to rush the harvest I say wait and the Girl will reward you!