GUESS WHO by ITZY (있지) has sold 339,940 copies in Korea.
GUESS WHO certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Korea |
339,940 | RIAK / Gaon charts | January 2022 |
Korea Sales: 339,940
Certification / note: RIAK / Gaon charts
Certification Date / sales as of: January 2022
|
| Total sales | 339,940 | (in 1 country) |
Total
Sales: 339,940
(in 1 country)
|
Year-end chart performance for GUESS WHO
| Chart 2021 | Rank | Sales |
| South Korean Albums (Gaon) |
42 | 339,940 |