We have at least more than thousand of colored changing PU in stock . So, customer could select color combination without considering the MOQ of the PU. For example, 1,000 PCS for 2 colors or 2,000 PCS for 4 colors. Low purchasing threshold of PU allows customers to have more colored combinations. Color matters. Because good color combination accomplished half of the design. Size of notebook and the inner paper paper can be customized.