Kanga® KeepU-Dri® is available in 8 different sizes to suit different applications.
KeepU-Dri® Waterproof Cast Protectors Size Guide:
| Product | Length* | Circumference** |
| Half Arm Small (adult/child) | 43 cm | 17 cm |
| Half Arm Large | 66 cm | 22 cm |
| Full Arm Small (adult/child) | 66 cm | 19 cm |
| Full Arm Large | 80 cm | 26 cm |
| Half Leg Small (adult/child) | 51 cm | 24 cm |
| Half Leg Large | 64 cm | 32 cm |
| Full Leg Small (adult/child) | 84 cm | 31 cm |
| Full Leg Large | 112 cm | 47 cm |
*Length is measured from the tip of the limb to at least 2 cm above the cast or bandage
**Circumference should be the widest part of the cast or bandage