It stands only 1.2 metres high, rectangular in plan and orientated east to west, its upper half tapering gradually toward the top. The rushes around it have partly swallowed it, so that a visitor walking the slope might almost miss it entirely. That combination, a small, partially obscured prehistoric marker in an unimproved field, is precisely what makes the place quietly compelling.

Standing stones are among the most common yet least understood prehistoric monuments in Ireland. Erected throughout the Bronze Age and possibly earlier, they were set upright in the landscape for reasons that remain genuinely unclear, whether as territorial markers, ritual focal points, or elements of a now-invisible ceremonial geography. The Crumpane stone, measuring 0.55 metres by 0.38 metres at its base, is on the smaller end of the scale, but what gives it additional interest is what lies just three metres to the south: a feature recorded as an anomalous stone group. That classification, suggesting a cluster of stones whose purpose or arrangement does not fit neatly into standard monument categories, hints that the immediate area may once have held a more complex arrangement than the single upright alone would suggest.