I claim the ornamental design for a sheet for vehicle seats, as shown and described.
FIG. 1 is a surface view of a sheet for vehicle seats according to the design claimed.
FIG. 2 is a reference view of FIG. 1, with dot dash broken lines being shown therein to identify the area 3 which circumscribes the location from which FIG. 3 is taken; and,
FIG. 3 is an enlarged detail view of area 3 surrounded by dot dash lines on FIG. 2.
The evenly spaced broken line perimeter represents the boundaries of the claim and forms no part thereof. The dot dash lines in FIGS. 2 and 3 represent the unclaimed boundary of the detail. The thickness and the rear of the sheet for vehicle seats form no part of the claimed design.