I want to say I tried one a very long time ago at work, but it was probably really crappy or had some special purpose. These days I'm using 36" desk mats for my mouse pad. I suppose I could put another, better mouse pad on top of that, but it seems to work sufficiently well. I think I bought my first X-Large mouse pad about 7 years ago and they were kind of rare. Now these giant desk mats are all the rage. I love this mat but I'm not paying $40 for it. https://deskmat.io/thomz/amethyst-valley-304593