  We have conducted a systematic search for stellar disk truncations in
disk-like galaxies at intermediate redshift (z<1.1) using the Hubble Ultra Deep
Field (UDF) data. We use the position of the truncation as a direct estimator
of the size of the stellar disk. After accounting for the surface brightness
evolution of the galaxies, our results suggest that the radial position of the
truncations has increased with cosmic time by ~1-3 kpc in the last ~8 Gyr. This
result indicates a small to moderate (~25%) inside-out growth of the disk
galaxies since z~1.
