You may copy, modify, publish, distribute, and sell this icon without an attribution condition. Public-domain treatment varies by jurisdiction, so retaining the Unlicense statement is the clearest approach.
Alternative duplicate symbol with slightly different offset squares. This line icon belongs to System Uicons, a source set with 432 SVG records. Its recorded source grid is 21px. It is indexed under replicate, duplicate, copy, clone, duplication, copying.
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