Ratios of jet cross sections for charged jets reconstructed using anti-$k_{\rm T}$ algorithm with resolution parameters 0.2 and 0.4 and 0.2 and 0.6. The jet acceptance is restricted to $\left|\eta^{\rm jet} \right| \leq {\rm 0.3}$. The ratios in data are compared to PYTHIA Perugia-2011 and HERWIG simulations.