BYB BY163 Ultra Heavy Cotton Box Tee Size Guide
| XS | S | M | L | XL | XXL | 3XL | 4XL | 5XL | |
| A - Half Chest | 61 | 64 | 67 | 70 | 73 | 76 | 80.5 | 85 | 89.5 |
| B - Body Length | 71.5 | 73.5 | 75.5 | 77.5 | 79.5 | 81.5 | 82.5 | 83.5 | 84.5 |
| C - Sleeve Length | 20.6 | 21 | 21.4 | 21.8 | 22.2 | 22.6 | 23 | 23.4 | 23.8 |
Sizes are in CM