IDEA BOOKS
| IDEA Books (EU) | US | Chest (cm) | Length from Shoulder (cm) | Sleeve Length (cm) |
| XS | XXS | 45 | 67.5 | 19.5 |
| S | XS | 48 | 69.5 | 20.5 |
| M | S | 51 | 71.5 | 20.5 |
| L | M | 54 | 73.5 | 21.5 |
| XL | L | 57 | 75.5 | 21.5 |
| XXL | XL | 60 | 77.5 | 22.5 |
| IDEA Books (EU) | US | Chest (cm) | Length from Shoulder (cm) | Sleeve Length (cm) |
| XS | XXS | 45 | 67.5 | 19.5 |
| S | XS | 48 | 69.5 | 20.5 |
| M | S | 51 | 71.5 | 20.5 |
| L | M | 54 | 73.5 | 21.5 |
| XL | L | 57 | 75.5 | 21.5 |
| XXL | XL | 60 | 77.5 | 22.5 |