Oversized mattresses can be fun to sleep on, but one of the biggest disadvantages to them is it can be hard to get accessories for them. You can’t just run out to the nearest big-box store and grab an off-the-shelf sheet set like you can with the standard sizes.
You’ll likely have to order sheets for your oversized mattress online. There are plenty of specialty shops that make sheet sets for non-standard bed sizes. Just remember, you’ll probably be paying a lot more for oversized bed sheets than you would for regular ones. You may also have to pay for shipping.