Size Guide | GK Kickers
TK 3 Plus
| Size | Shoe Size |
| X-Small | 2-3.5 |
| Small | 3.5-6 |
| Medium | 6-8 |
| Large | 8-12 |
OBO Yahoo
| Size | Shoe Size |
| Small | 3-5.5 |
| Medium | 5.5-8.5 |
| Large | 8.5-12 |
OBO HI Rebound
| Size | Shoe Size |
| Medium | 5-8.5 |
| Large | 8.5-12 |
| X-Large | 12+ |
OBO ROBO PLUS
| Size | Shoe Size |
| Medium | 5-8.5 |
| Large | 8.5-12.5+ |
Genesis 0.3
| Size | Age |
| XX-Small | 7-9 |
| X-Small | 9-11 |
| Small | 11-12 |
| Medium | 12+ |
Genesis 0.1 and 0.2
| Size | Shoe Size |
| Medium | 5-8 |
| Large | 8-12 |
EVO Pro
| Size | Shoe Size |
| Medium | 5-8 |
| Large | 8-12 |