Stitched edges are worth the extra cost.

Yes, they prevent fraying and keep the mat looking new for years.

Unstitched edges are basically cut fabric. No matter how nice the material, the edge will start to fray over time, especially if you move the mat around, rest your wrists there, or have a cat that walks across your desk. Cheap mats show it within months. Stitched edges lock the fibers in place. They add a bit to the price, but a desk mat is something you use every day—like a good mouse or keyboard. The extra $10–$15 is a lot cheaper than buying a replacement in a year.

Your desk mat should outlast your next mouse.