Made of a flexible translucent white plastic, this Stopper or Plug is designed to flush fit into round openings. It is very slightly tapered for a snug fit, measuring 2-1/4 inch (57.15mm) diameter at the top, 2-1/8 inch (53.97mm) diameter at the bottom and 1 inch (25.4mm) height. There is a lip at the top (see image) that measures 2-1/2 inches (63.5mm). These are suitable for a variety of applications such as salt and pepper shakers, flat panels, plugging pipe ends and similar uses. Please Note: Measure the opening of your object carefully to make sure the plug will fit snug. A slight difference from the opening measurement shown above can be the difference between a snug or a loose fit.