A mural is a:

A mural is a large-scale painting or artwork applied directly onto a wall, ceiling, or other permanent architectural surface. The word comes from the Latin murus, meaning "wall." Murals can be created using various techniques including fresco (painting on wet plaster), mosaic, or direct painting with acrylics or oils on a prepared wall surface.

A sketchbook is a bound collection of blank pages used for drawing practice and planning, not a finished wall artwork. A small sculpture is a three-dimensional object, not a wall painting. A clay pot is a ceramic vessel made through pottery, an entirely different art form.