Perforation layout

| Dimension/hole |
mm |
| a |
≥10 |
| b |
≥10 |
| c |
d+15, d+25, d+30 |
| d |
12, 16, 20, 30 |
Symmetrical perforation: Fully perforated in symmetrical square layout. Only 1 hole size (d) and distance (a, b, c) per product.
Art perforation: Fully or partly perforated in freely chosen locations. All hole sizes (d) and distances (c) available per product.