  In this letter, we measure the rest-frame optical and near-infrared sizes of
ten quiescent candidates at $3<z<5$, first reported by Carnall et al. (2023a).
We use James Webb Space Telescope (JWST) Near-Infrared Camera (NIRCam) F277W
and F444W imaging obtained through the public CEERS Early Release Science (ERS)
program and imcascade, an astronomical fitting code that utilizes
Multi-Gaussian Expansion, to carry out our size measurements. When compared to
the extrapolation of rest-optical size-mass relations for quiescent galaxies at
lower redshift, eight out of ten candidates in our sample (80%) are on average
more compact by $\sim$40%. Seven out of ten candidates (70%) exhibit rest-frame
infrared sizes $\sim$10% smaller than rest-frame optical sizes, indicative of
negative color gradients. Two candidates (20%) have rest-frame infrared sizes
$\sim$1.4$\times$ larger than rest-frame optical sizes; one of these candidates
exhibits signs of ongoing or residual star formation, suggesting this galaxy
may not be fully quenched. The remaining candidate is unresolved in both
filters, which may indicate an Active Galactic Nuclei (AGN). Strikingly, we
observe three of the most massive galaxies in the sample
(log(M$_{\star}$/M$_{\odot}$) = 10.74 - 10.95) are extremely compact, with
effective radii ${\sim}$0.7 kpc. Our findings provide no indication that the
size evolution relation flattens out, and may indicate that the size evolution
of quiescent galaxies is steeper than previously anticipated beyond $z>3$.
