Abstract: An adjustable bed sheet includes a sheet made of a first material. The sheet spans at least the length and the width of the mattress. A perimeter of the sheet is defined by edges thereof. The bed sheet also includes an elongated strip made of a second material that is more stretchable than the first material. The strip has a first elongated side opposite a second elongated side. The strip is attached, via the first elongated side, to an edge of the sheet such that, when the adjustable bed sheet is applied to the mattress, the strip is positioned, with respect to the mattress, to extend around at least one corner of the mattress from the length side of the mattress to the width side of the mattress. An end flap is attached to and hanging from the second elongated side of the strip.