The Different Shapes of Chicken Nuggets

The other day, out of desperation, I had some of my wife's vegetarian chicken nuggets. They're actually quite good. But interestingly, they have given their chicken nuggets the same what I presume are arbitrary shapes that McDonald's use for their chicken n Nuggets. There's four particular shapes that the chicken nuggets come in. And they seem to have copied or replicated it in some way,. because they looked just like McDonald's chicken nugget shape.