We compute the scaling dimensions of a large class of disorder operators ("monopoles") in the planar limit of CS-fermion theories.The lightest such operator is shown to have scaling dimension (2/3) k^{3/2} where k is the CS level. The computation is based on recently developed techniques for solving CS-matter at all 't Hooft couplings. The desired operator dimensions are obtained by finding complex saddles in the low-temperature phase of the CS-fermion path integral in a monopole background. We will also discuss the implications of this result to the 3D bosonization dualities.
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