Plants are 6 to 8 inches tall. Some recomend 10 inches. Was thinking topping at 12 inches, but only have 6 ft. Of vertical space, (floor to light).
12" is good. Look up how to do a FIM instead of just topping: it will give you 4 tops instead of 2 which allows you to send to diagonal corners of the SCROG.
6 feet of height is perfect for doing a screen: I regularly do a plant that’s only 30" high and yields 14 oz.
Dude thats a serious plant there. I like it. Great job. Im working on getting my plants to look like that. One day my friend. One day.
The size guide doesn’t always work for me. I grow indoors and start flowering at 6 weeks, So I top at day 30, 40 and again at day 50.