Unless you are a landscape architect, you may not realize that clients can order shrubs from nurseries by diameter. Let's say a client orders a dozen 65-centimeter shrubs. Since shrubs tend to grow as they like, with no two alike, it would provide a headache for the nursery to go out and measure what's in the field, or painstakingly trim each one to size.
Hence Italy's Orlandi Group exists. They create specialized machinery that solves problems for nurseries, like this buxus trimming machine being used in Holland:
"[This is] how to have all your plants' diameters uniform and constant over time," the company writes. "So when your customers ask for a buxus that's 40cm in diameter, you're sure you will give them a buxus of 40cm."
Next they plan to adapt the technology for barbershops. (Yes, I'm kidding.)