Member ages
JUSTB Member Ages and Birthdays
JUSTB member ages and birthdays ranked oldest to youngest, from Geonu at age 25 to Sangwoo at age 23.
Oldest to youngest
| Rank | Member | Age | Birthday | Position |
|---|---|---|---|---|
| #1 |  GeonuMember | 25 | Feb 2, 2001 | Lead Vocalist |
| #2 |  BainMember | 25 | May 4, 2001 | Lead Dancer, Main Vocalist |
| #3 |  Lim JiminMember | 25 | May 22, 2001 | Leader, Lead Vocalist, Lead Dancer, Lead Rapper, Center, Visual |
| #4 |  SiwooMember | 24 | Oct 11, 2001 | Sub Vocalist, Visual |
| #5 |  DYMember | 24 | Feb 21, 2002 | Main Rapper, Main Dancer, Sub Vocalist |
| #6 |  SangwooMember | 23 | Sep 3, 2002 | Maknae, Lead Dancer, Sub Vocalist, Sub Rapper |