- Curved front panel shape
- Available in multiple crown heights (7.5 cm – 8.5 cm)
- May be made with Structured or Unstructured front panels
- Sloped front panel shape
- Available in multiple crown heights (8 cm – 8.5 cm)
- Structured front panels are most popular, but may be made as Unstructured
- Straight front panel shape
- Available in multiple crown heights (9 cm – 9.5 cm)
- Structured front panels are most popular, but may be made as Unstructured