Roughly sixty centimetres square, it would be easy to mistake for an ordinary paving stone, except that its upper surface is drilled with a precise arrangement of sockets: a subcircular hollow at the centre, a smaller and deeper hole within that, and four further circular recesses positioned near each corner. Nothing rises from any of these holes. Whatever was once fitted into them is long gone.

The slab is a font base, the lower section of what would originally have been a two-part baptismal font. A font pedestal, likely a turned or carved stone column, would have been socketed into the central holes, and the basin used for baptism would have sat on top of that. The arrangement of sockets, a larger housing to seat the shaft and a smaller, deeper bore at its core to pin it steady, is a straightforward piece of medieval joinery in stone, designed to hold the assembly upright and stable. The four corner sockets near the edges of the slab may have served a similar anchoring or structural purpose. Simon Large identified and photographed the stone in 2011, and it remains in situ within the church, which is recorded separately as a medieval ecclesiastical site.