Nearly three metres long and carved from a single slab of limestone, it is decorated with a seven-armed segmental cross in relief, its terminals finished in fleur-de-lis, with cross-bands marking both the base of the cross-head and the base of the shaft. A raised border frames the whole surface, and running around that border, cut in Black Letter script, is a Latin inscription that circles the slab almost completely: beginning along the top, travelling down the right-hand side, continuing along the bottom, and finishing along the left.

The inscription commemorates Edmund Comyn of Tullamain, who died on the 23rd of December 1575, and Gráinne, also known as Grace, daughter of Eugene McCarthy, who is identified as the person who erected the monument. The Latin phrase on the left-hand side, "me fieri fecit," translates as "who caused this to be made," a conventional formula on late medieval memorial slabs indicating who commissioned the work. An early Ordnance Survey transcription of the text misread the "M" in McCarthy as "vi," rendering the name as "viccarthy" rather than "Mccarthy," a small but telling reminder of how easily manuscript readings can go quietly wrong. The OS illustration of the slab, made before further breakage occurred, shows the upper portion largely complete and only the right-hand side of the lower portion surviving, whereas examination of what remains today suggests the lower portion is actually more complete than that earlier record implied, with portions of the left-hand side of the inscription still readable that the illustration did not capture.