The ornamental design for a T-shirt shape bed sheet, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a T-shirt shape bed sheet in full lines covering a mattress, showing my new design; a nonspecific team symbol shown in broken lines, representing environmental association matter being for illustrative purposes only and forming no part of the claimed design;
FIG. 2 is a top plan view thereof, the nonspecific team symbol shown in broken lines;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a front elevational view thereof; and,
FIG. 7 is a rear elevational view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating portions of the T-shirt shape bed sheet that form no part of the claimed design.