2 Set Solid Watercolor Paint Multi Color Children's Drawing Sketching Pigment Art Supplies12 Colors Item Type: Solid Watercolor Paint Powder Diameter: 12 Colors: Approx. 3cm / 1.2in, 16 Colors: Approx. 2.3cm / 0.9in (there are tiny size error due to manual measurement) 12-Color Box Size: Approx. 22 x 8.8 x 1.4cm / 8.7 x 3.5 x 0.6in (there are tiny size error due to manual measurement) 16-Color Box Size: Approx. 22 x 8.8 x 1.4cm / 8.7 x 3.5 x 0.6in(there are tiny size error due to manual measurement) How e: When using, dip the watercolor pen in water and moisten the powder paint. When the solid paint is dissolved, you can start using it. The transparent cover can be used as a color palette.