| 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 ❌        |