Hey!
Those buds look ripe and ready for harvest!
They won't grow anymore, they'll just mature now keep an eye on those trichomes to not over do it.
Harvest window opens when you start getting amber pistils.
The best way to check is looking at the trichomes on the buds with a 60X magnifying loupe
Clear trichomes haven't reached their full potency, cloudy ones are full of THC and amber are losing THC while gaining CBN.
I harvest when after examining and finding 70% cloudy trichomes and 30% amber trichomes.
For me that's a prefect combination, depending on the strain as well.
With that 30% amber i find that deep indica effect you look for, with my cream caramel i harvest with 30% and it's almost a heavy narcotic high.
Very potent indica as well though.
With some strains I go with lower amount of amber trichomes but always attest 10%.
This really depends on what type of high your looking for.
As for what they look like, clear trichomes look like shiny glass, cloudy like plastic and amber like resin
Hope this helped.
Good luck and happy harvest!