| Size | Above the Knee Circumference | Calf Circumference |
| S/M |
25.5 - 30.5 cm 10" - 12" |
16.5 - 21.5 cm 6.5" - 8.5" |
| L/XL |
30.5 - 35.5 cm 12" - 14" |
21.5 - 27cm 8.5" - 10.5" |
G-Form Pro-X3 Youth Knee Guard Size Chart
| Size | Above the Knee Circumference | Calf Circumference |
| S/M |
25.5 - 30.5 cm 10" - 12" |
16.5 - 21.5 cm 6.5" - 8.5" |
| L/XL |
30.5 - 35.5 cm 12" - 14" |
21.5 - 27cm 8.5" - 10.5" |