How long till harvest ?

Yes they will get much bigger. Looking at the breeder information flowering is 42-49 days. It looks like week 6 is when your baby started flowering. So you have a while to go. I also looked at the 2 harvests with your strain and one was harvested week 12 the other was harvested week 16. Just to give you an idea. Looks like you got a rare phenotype having purple buds. Congrats they look amazing. The best way to tell harvest is to get a jewelers loupe or digital microscope to look at the trichomes. The have the most THC when they are cloudy. The start clear and go cloudy to amber. Another way is when 90% of the white hairs go brown you have 1-2 weeks left. Good luck

They look great! I'd guess about 2-4 weeks on harvest. They will get bigger yes.