Size Guide: Zen Grandad Collar Shirt
| Size | Back Length | Sleeve Length | Chest | Waist | Bottom |
| XS | 75,5 | 65,5 | 98 | 93 | 95 |
| S | 76,5 | 66 | 104 | 96 | 98 |
| M | 77,5 | 67 | 110 | 102 | 104 |
| L | 78,5 | 68 | 116 | 108 | 110 |
| XL | 79,5 | 69 | 124 | 118 | 120 |
| XXL | 80,5 | 70 | 132 | 126 | 128 |
| Size | Back Length | Sleeve Length | Chest | Waist | Bottom |
| XS | 75,5 | 65,5 | 98 | 93 | 95 |
| S | 76,5 | 66 | 104 | 96 | 98 |
| M | 77,5 | 67 | 110 | 102 | 104 |
| L | 78,5 | 68 | 116 | 108 | 110 |
| XL | 79,5 | 69 | 124 | 118 | 120 |
| XXL | 80,5 | 70 | 132 | 126 | 128 |