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*The measurements for height increases are not based on the actual size of the Jack, but the difference in height of a person while wearing Jacks in a pair of shoes vs. not wearing Jacks in the same pair of shoes. The measurements are also approximations.

**White and Brown LLC the owner of the Jacks brand makes no claim as to the safety or potential health affects which may or may not be caused by using its products. Use Jacks at your own risk.