| X-Small | 31 - 34" | 26 - 28" |
| Small | 34 - 37" | 28 - 30" |
| Medium | 37 - 40" | 31 - 33" |
| Large | 40 - 43" | 34 - 36" |
| X-Large | 43 - 46" | 37 - 39" |
| XX-Large | 46 - 49" | 40 - 42" |
| XXX-Large | 54 - 56" | 46 - 48" |
| X-Small | 33" | 25" | 29" | 35" | 29" |
| Small | 34-35" | 26-27" | 29.5-30" | 36-37" | 29-29.5" |
| Medium | 36.5" | 28.5" | 30.5" | 38.5" | 30" |
| Large | 38" | 30" | 31" | 40" | 30" |
| X-Large | 39.5-41" | 31.5-33" | 31.5-33" | 41.5-43" | 30.5" |
| X-Small | 22" | 21" | 21" | 40" | 35-45 LB |
| Small | 24" | 22" | 23" | 45" | 45-55 LB |
| Medium | 26.5" | 24" | 25" | 50" | 55-65 LB |
| Large | 29" | 26" | 27" | 55" | 65-75 LB |
| X-Large | 31.5" | 28" | 29" | 60" | 75-90 LB |
| 6 Inches | 7 Inches | 8 Inches | 9 Inches | 10 Inches | 11 Inches | 12 Inches | 13 Inches |
| 3 Inches | 4 Inches | 5 Inches | 6 Inches | 7 Inches |
| 68 | 9 Months |
| 80 | 18 Months |
| Small | 2 Years |
| Medium | 3 years |
| Large | 4 Years |
| YS Helmet Size | YS Helmet Size | YM Helmet Size | YM Helmet Size | YL Helmet Size | YL Helmet Size | XS Helmet Size | XS Helmet Size | S Helmet Size | S Helmet Size | M Helmet Size | M Helmet Size | L Helmet Size | L Helmet Size | XL Helmet Size | XL Helmet Size | XXL Helmet Size | XXL Helmet Size |
| 38 Euro | 38.7 Euro | 39.3 Euro | 40 Euro | 40.5 Euro | 41 Euro | 42 Euro | 42.5 Euro | 43 Euro | 44 Euro | 44.5 Euro | 45 Euro | 46 Euro | 46.5 Euro | 47 Euro |
| 6 US | 6.5 US | 7 US | 7.5 US | 8 US | 8.5 US | 9 US | 9.5 US | 10 US | 10.5 US | 11 US | 11.5 US | 12 US | 12.5 US | 13 US |
| 23.5 CM | 24 CM | 24.5 CM | 25 CM | 25.5 CM | 26 CM | 26.5 CM | 27 CM | 27.5 CM | 28 CM | 28.5 CM | 29 CM | 29.5 CM | 30 CM | 30.5 CM |
| 34 Euro | 35 Euro | 35.5 Euro | 36 Euro | 37 Euro | 37.5 Euro | 38 Euro | 38.5 Euro | 39 Euro | 39.5 Euro | 40 Euro | 41 Euro | 42 Euro |
| 4.5 US | 5 US | 5.5 US | 6 US | 6.5 US | 7 US | 7.5 US | 8 US | 8.5 US | 9 US | 9.5 US | 10 US | 10.5 US |
| 21.5 CM | 22 CM | 22.5 CM | 23 CM | 23 CM | 23.5 CM | 24 CM | 24 CM | 24.5 CM | 25 CM | 25.5 CM | 26 CM | 26.5 CM |
| 29 Euro | 29.7 Euro | 30.5 Euro | 31 Euro | 31.5 Euro | 33 Euro | 33.5 Euro | 34 Euro | 34.7 Euro | 35 Euro | 35.5 Euro | 36 Euro | 37 Euro | 37.5 Euro | 26 Euro | 26.5 Euro | 27 Euro | 27.5 Euro | 28 Euro | 28.5 Euro | 29 Euro | 30 Euro | 30.5 Euro | 31 Euro | 31.5 Euro | 32.2 Euro | 33 Euro | 33.5 Euro | 34 Euro | 35 Euro |
| 12 US | 12.5 US | 13 US | 13.5 US | 1 US | 1.5 US | 2 US | 2.5 US | 3 US | 3.5 US | 4 US | 4.5 US | 5 US | 5.5 US | 9 US | 9.5 US | 10 US | 10.5 US | 11 US | 11.5 US | 12 US | 12.5 US | 13 US | 13.5 US | 1 US | 1.5 US | 2 US | 2.5 US | 3 US | 3.5 US |
| 16.5 CM | 17 CM | 17.5 CM | 18 CM | 18.5 CM | 19 CM | 19.5 CM | 20 CM | 20.5 CM | 21 CM | 21.5 CM | 22 CM | 22.5 CM | 23 CM | 14.5 CM | 15 CM | 15.5 CM | 16 CM | 16.5 CM | 17 CM | 17.5 CM | 18 CM | 18.5 CM | 19 CM | 19.5 CM | 20 CM | 20.5 CM | 21 CM | 21.5 CM | 22 CM |