I have been spreading the word about taking tomato cuttings for years, they soon catch up too and are exactly like the host plant.
At first people did not believe it could be done but the tomato is one of the easiest plants to take cuttings from. I have taken huge ones of 10" which sprouted undetected, just to see if they would grow and they wilted a little but soon recovered. As soon as they are big enough to handle comfortably is fine and you do not need to snip or cut , just rip them off.
I take cuttings from geraniums and fuscias (which I can never remember how to spell) too. It can save a fortune with plant buying. To buy tiny plugs early of just one plant and use it for cuttings. I do the same with herbs when they get woody, I take a cutting from the tips. Rosemary, Thyme, and so on. There is not much to lose if the cutting does not take.