Made of a flexible red plastic, this plug is designed to flush fit into round openings. It is very slightly tapered for a snug fit, measuring 1-5/16 inch (33.34mm) diameter at the top just beneath the flange, 1-1/4 (31.75mm) diameter at the bottom and 3/4 inch (19.05mm) height. The flange at the top (see image) measures 1-1/2 inch (38mm) diameter. The stopper is suitable for a variety of applications such as salt and pepper shakers, coin banks, 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 measurements shown and described above can be the difference between a snug or a loose fit. Note the color of this item has changed due to production cost, but quality and size have not.