Answer:
The Prophet (PBUH) said, “Whoever imitates a people is one of them” (Reported by Ibn ʿUmar, Narrated in Abu Dawood 3512).
The practice of wearing a half-string (waist rope) in certain communities is often associated with religious rituals or the belief that it provides protection against evil forces.
Similar to the marriage badge being a cultural or religious practice from other faiths, the half-string also holds symbolic significance in some non-Islamic cultures. Since imitating other religious customs is discouraged in Islam, it is advised to avoid wearing it with such beliefs.
However, if the string is used for practical purposes without any superstitious or religious connotation—such as tying objects, managing menstrual necessities, or other legitimate needs—it is permissible as a simple utility.
Conclusion:
Avoid using it as a religious or cultural symbol, but it is acceptable for practical and necessary uses.