VLSSr 74 MHz images for the 14 SNRs in our sample, with an 75′′ angular resolution. The colour scale, given on top, is linear scaling from 4 times the local rms noise level (4σ) to the peak intensity value of the subimage, S_peak (see values quoted in Table 1). The contours levels of the 74 MHz emission start at 4σ increasing in steps of 25, 50, and 75% of the scale range. Exceptions are Tycho and 3C 397 for which an 8σ lower limit was chosen. A cyan horizontal line of 2′ length is included in each panel to facilitate the comparison between the SNRs’ sizes.