Nearly two metres tall and more than one and a half metres wide, it is not a gravestone in any simple sense. It is a carefully assembled heraldic statement, carved in high relief, combining two family identities into a single composition with a precision that would have been immediately legible to anyone versed in the conventions of early seventeenth-century heraldry.

The monument was erected in 1634 by Thomas Tobin and his wife Jane, also known as Marrinel, to commemorate themselves and Thomas's parents, Edmund Tobin of Brisclagh, gentleman, and Margaret Tobin. A Latin inscription in Black Letter script runs along a rectangular plaque beneath the main composition. The heraldic achievement above it, an arrangement of arms, helmets, crests, and supporting scrollwork, shows impaled arms, meaning two coats of arms placed side by side on a single shield to represent a marital union. The right-hand side carries the Tobin arms, three oak leaves, while the left carries the arms of the Cahir branch of the Butler family, their chief indented and augmented with a canton bearing the figure of Christ on a cross. Both sides of the shield are marked with a crescent, the cadency mark used to identify a second son within a family line. Two crested helmets sit above, the right bearing the Tobin crest of a demi-lion holding an oak branch, the left the Butler crest of a falcon rising from a plume of five ostrich feathers. Flanking the main achievement, just within the decorative scrolls, are two smaller shields surmounted by marigolds. The initials beneath the sinister shield, I.M., are thought to refer to Joanna Marrinel. Above everything, a moulded cornice supports a semi-circular open-fan device, a squared pillar topped with a ball, and two flanking obelisks, each once topped with a ball, though only one survives intact.