It's not possible to query for ez media field type width, as it ends with an error.
Steps to reproduce:
1. Login as admin
2. Create a new Content Type named "MyMedia"
3. Add ez media fieldtype
4. Create a Content Item using that Content Type
5. Regenerate GraphQL schema and clear cache
6. Enter query similar to:
This is most likely caused by a typo here: https://github.com/ezsystems/ezplatform-graphql/blob/ba2ae941042951245f237fb19026a4ea1e247498/src/Resources/config/graphql/Field.types.yml