These charts are for reference only. Fit may vary depending on the construction materials and manufacturer
| Beneunder Size | Inches | CM |
| Upper circumference length | 11.42 | 29 |
| Center seam length | 7.87 | 20 |
| Lower jaw length | 47.44 | 120.5 |
| Mouthpiece height | 11.26 | 28.6 |
| Ear Cord Length | 6.10 | 15.5 |
