Which characteristic best describes the size of the Ife head sculpture?

The Ife head sculptures are renowned for their remarkable craftsmanship and representational accuracy of human features. The characteristic that best describes these sculptures is that they are life-size. This means they are sculpted to be approximately the same size as an actual human head, which allows for a realistic portrayal of facial expressions and intricate details. Their life-size dimensions contribute significantly to their impact as they invite viewers to engage with them on a human scale.

When considering the other options, smaller than life size and miniature imply a reduction in scale that is not true of the Ife heads, which are intended to resonate with real human proportions. Larger than life-size would suggest a dramatic enlargement that isn't characteristic of these sculptures, which aim for authenticity rather than exaggeration. Thus, the correct characterization of the Ife head is life-size, underscoring their significance and the cultural context in which they were created.