There's two types of square cut, and one is fantastic while the other should be punishable by a week in the stockade.

The good way, is starting with a square or rectangle to begin with, and then slicing once down the middle long way, once down the middle short way, and then one down the middle-left and middle-right, for a total of 8 rectangular/square slices. Then you have the corners with more crust, but at least every slice has some crust and some size to it. Most tavern style places will do this one.

The abomination, is to start with a circle, cut a cross into it, and then divvy it up from there like graph paper. The middles get square but with no crust and about the size of a cracker. The edges get at least 4 points that are just crust with about 1cm worth of pizza, and it doesn't get better from there. There's literally 4-8 squares on that whole thing that have enough crust to pizza ratio and they're still the size of a cracker. "It's better for sharing" no it isn't, pizza is already perfect for sharing you just didn't want to order enough. Dominos does their thin crust this way by default (and they fuck up because of muscle memory if you ask for it pie cut like a smart person.)

Your fingers definitely do get greasy, lol.