MightyTykes Wrist and Ankle Weights Safe and easy to use. Latex-free, lead free. CPSIA-Compliant Created by a special needs mom with the help of physical and occupational therapists. May help with many different conditions including weakness, hypotonia, toe-walking, sensory issues, visual field-cut, among others. Always consult your health care provider or therapist before guidance with any exercise regimen. Measurements: 1/8lb. - 1.5"w x 8"l, 1/4lb. - 1.75"w x 9.25"l, 1/2lb. - 2.25"w x 10"l. Weights vary to adjust to fit from 4.5" - 8".