A small paving stone, also known as a sett, is a flat rectangular block of stone used to create pathways and patios. It is typically made from granite, sandstone, or limestone and is usually 4-6 inches thick. The size of the stone can vary, but it is usually around 4-6 inches long and 2-4 inches wide. Sett stones are often used in combination with other materials such as gravel or concrete to create a durable and attractive surface.