Here is a step-by-step how-to to help you how you can fold your fitted sheets properly.
To start: Take the sheet and hold it up so the long side is across your body. Usually the long side is one of the sides where the elastic doesn’t run from corner to corner. Find the very corner of the corners, where the sheet is stitched together and stick your fingertips in there (Fig. 1).
Next, bring the two corners together, keeping your fingertips inside them, as shown in Fig. 2.
Flip one corner up over the other and center the point of the corner inside the point of the other corner (Fig. 3).
You should now have one neatly folded bit as seen in Fig. 4.
Lay the sheet down on a flat surface and arrange the corner you just created as seen in Fig. 5. Now repeat steps 1-5 with the remaining two corners.
Once you’ve done that, fold in half as seen in Fig. 6.
Fold in half again (Fig. 7) and then one more time (Fig. 8).
Take the left and right sides, and fold in to the middle as seen in Fig. 9. It’s not going to be perfect, that’s fine. (I’m not Martha Stewart, and if you’re reading this for help, neither are you.) Smooth out the bumps and bulges as best you can.
Finally, at the point where the two ends meet in the middle from the previous step, fold in half again. And there you have it! A nicely-folded fitted sheet that fits in your linen closet, and doesn’t look like you just balled it up and shoved it in there.