I claim the ornamental design for a device for holding items to a seat, as shown and described.
FIG. 1 is a front elevation view of the device for holding items to a seat showing my new design using a mesh fabric surrounded by elasticized bands on top and bottom;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a perspective view thereof.
The broken lines depicting part of a car seat in FIG. 7 are for illustrative purposes only and form no part of the claimed design.