Member heights
I.O.I Member Heights
I.O.I member heights ranked tallest to shortest, from Doyeon at 173 cm (5 ft 8 in) to Yoojung at 157 cm (5 ft 2 in).
Average166.1 cm5 ft 5 in
Tallest to shortest
| Rank | Member | Height | Position |
|---|---|---|---|
| #1 | DoyeonFormer member | 173 cm5 ft 8 in | Vocalist, Visual |
| #2 |  SomiFormer member | 172 cm5 ft 8 in | Lead Dancer, Lead Vocalist, Rapper, Face of the Group, Center, Maknae |
| #3 |  NayoungFormer member | 171 cm5 ft 7 in | Leader, Main Rapper, Lead Dancer, Vocalist |
| #4 |  YeonjungFormer member | 168 cm5 ft 6 in | Main Vocalist |
| #5 |  KyulkyungFormer member | 167 cm5 ft 6 in | Lead Dancer, Vocalist, Visual |
| #6 |  ChaeyeonFormer member | 166 cm5 ft 5 in | Vocalist, Visual |
| #7 |  SohyeFormer member | 166 cm5 ft 5 in | Vocalist, Rapper |
| #8 |  SejeongFormer member | 164 cm5 ft 5 in | Main Vocalist |
| #9 |  MinaFormer member | 162 cm5 ft 4 in | Lead Dancer, Vocalist, Rapper |
| #10 |  ChunghaFormer member | 161 cm5 ft 3 in | Main Dancer, Lead Vocalist, Rapper |
| #11 | YoojungFormer member | 157 cm5 ft 2 in | Lead Rapper, Lead Dancer, Lead Vocalist |