I claim the ornamental design for a sheet of wristbands, as shown and described.
The FIGURE is a front view of a sheet of wristbands according to the invention.
The embodiment shown in the FIGURE is a sheet of wristbands including multiple wristband straps of equal width separated by serrated lines and including wavy tamper cuts shown in broken lines.
The FIGURE shows a front view of the sheet of wristbands. The opposite view of the FIGURE is not a matter of ornamental concern, has been omitted from the drawing, and forms no part of the claims. Additionally, the right, left, top, and bottom views of the sheet of wristbands shown in the FIGURE would show only an edge or line and have therefore been omitted from the drawing and form no part of the claims.
The broken line showing wavy lines is included for the purpose of illustrating environmental structure and forms no part of the claimed design.