This is the Compact size painting palette. The main mixing area's dimemsions are 9 1/2"x 15. Exterior measurement 13.5x16.5) You can hold and mix your oil paint in the palette just like it is. You can also mix paint in the two side wings or use them to place your brushes, palette knives, or brush cleaner container. It is recommended that you apple a thin coat of linseed oil to cut down the absorbancy. Some artists like to have a piece of glass or plexiglass to fit. This palette will fit into many medium size backpacks and rolling syle carry on suitcases, great for travel.