Elbow & Palm Pads:
| Size | S | M | L |
| Elbow Upper Circumference | 7 1/2" – 10 1/4" | 9 7/16" – 11" | 10 5/8" – 11 13/16" |
| Under Elbow Protection | 6 11/16" – 8 11/16" | 8 1/4" – 9 13/16" | 9 13/16" – 10 5/8" |
| Support Center | 5 1/2" – 6 5/16" | 6 11/16" – 8 1/4" | 8 11/16" – 9 13/16" |
| Suitable for Weight | Up to 77 lbs | 79 – 128 lbs | 130 – 176 lbs |

1: Elbow Upper Circumference
The circumference was measured 2 1/2" above the center of the elbow joint.
2: Under Elbow Protection
The circumference was measured 2 9/16" below the center of the elbow joint.
3: Support Center
Measure the circumference of the center of the wrist.
Knee Pads:
| Size | S | M | L |
| Upper Circumference | 11" – 13 3/8" |
11 13/16" – 14 3/16" |
13 3/4" – 15 3/4" |
|
Lower Circumference |
8 11/16" – 11 1/2" |
11 1/2" – 12 5/8" |
12 5/8" – 14 3/16" |
| Suitable for Weight | Up to 77 lbs | 79 – 128 lbs | 130 – 176 lbs |
1: Upper Circumference of Knee Protection2: Lower Circumference of Kneepad
The circumference was measured 2 3/4" below the center of the knee joint.
(To measure, keep the knee bent about 30 degrees.)