- X (manga) Costume
- X 1999 Costume
- X-1999 Costume
- X-Men Costume
- X-Men Evolution Costume
- X-Men First Class Costume
- X-Men: Days of Future Past Costume
- X-Men: Mutant Apocalypse Costume
- X-Overd Costume
- Xabungle Graffiti Costume
- Xblaze Code: Embryo Costume
- XCOM 2 Costume
- Xena Costume
- Xenoblade Chronicles Costume
- Xenoblade Chronicles 2 Costume
- Xenogears Costume
- Xenosaga Costume
- Xenosaga: The Animation Costume
- Xiaolin Showdown Costume
- XO Sisters Costume
- xxxHolic Costume
