| Type | Pointer to Data | Data Length | Pointer to VTable | Total Width |
| --- | --- | --- | --- | --- |
| `&String` | ✅ | ❌ | ❌ | 1 ✅ |
| `&str` | ✅ | ✅ | ❌ | 2 ✅ |
| `&String as &dyn ToString` | ✅ | ❌ | ✅ | 2 ✅ |
| `&str as &dyn ToString` | ✅ | ✅ | ✅ | 3 ❌ |