Like, if I want to put in new stone counters, in general I'm picking a kind of stone I like, and the firm measures or makes a template of my use, and cuts from a slab, right? If I have a really small job, perhaps it's possible to get a deal from the offcuts of some prior installation. I don't think it's generally an available option to e.g. get measurements and then peruse a list of countertops removed from recent local renovations where the dimensions are strictly larger than mine, and have my counter cut by trimming their 11' linear counter to my 10' space. But given that widths/depths are often determined by (standard) cabinet or vanity measurements, I feel like this ought to be doable, and these materials could have a straight-forward series of multiple uses.