OP.4 by LENA PARK (박정현) has sold 296,126 copies in Korea.
OP.4 certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Korea |
296,126 | RIAK / Gaon charts |
Korea Sales: 296,126
Certification / note: RIAK / Gaon charts
Certification Date / sales as of:
|
|
| Total sales | 296,126 | (in 1 country) |
Total
Sales: 296,126
(in 1 country)
|
Year-end chart performance for OP.4
| Chart 2002 | Rank | Sales |
| South Korean Albums (Gaon) |
15 | 296,126 |