How does paint by numbers for adults work?

Adult paint by numbers works by matching each numbered section on the printed linen canvas with the numbered acrylic paint pot. Paint one area at a time, using the paper chart to check the colour and number. You do not need to mix colours. The complete kit includes three brushes, so you can choose the fine, medium or wide brush for each section. Painting time varies by size, from about 10 hours for a 15 x 15 cm canvas to around 20 to 40 hours depending on the size.