The Potter's Unfired Clay: On the Unfixed Shape of an Unset Container

There is a moment in the making of a pot, before the kiln’s fire has done its work, when the shape is still mutable. A gentle pressure from the wrong place, a careless bump against the studio table, and the elegant curve of a bowl can become a lopsided, sorry thing. It holds its form, but only just. It is vulnerable. This is the state of an element on our page without a defined container, an aspect ratio unset, a size left to the whims of its content. It is clay that has not yet been fired.

We often speak of layout stability as a technical goal, a metric to be chased and conquered. We measure Cumulative Layout Shift and seek to lower its score. But beneath that clinical terminology lies a quieter, more human truth: a page that shifts as it loads is a page that betrays a lack of care. It is a conversation that keeps interrupting itself, a story that jumps ahead before you’ve finished the paragraph. It is the potter’s hand, trembling.

To leave an image or a video without its dimensions is to invite this tremor into our work. The browser, eager to please, paints what it knows. It renders text, it constructs boxes from our CSS. Then it discovers the asset—a large photograph, an embedded video—and understands its true proportions. With a silent, digital sigh, it must push everything else down the page to make room. The ‘read more’ button you were about to click vanishes under your cursor. The headline you were reading jumps away. This is not a bug; it is a lapse in foresight. It is the assumption that the content will arrive instantly, that the shape of things will be known from the very start.

Giving an element a home before it arrives is an act of profound respect—for the person on the other side of the screen, for the integrity of the layout, for the story we are trying to tell. Defining a container’s height and width, or at the very least, its aspect ratio, is like the potter building a sturdy, well-proportioned mold. It is a promise. It says: something will be here, and it will live right in this space. The surrounding elements can settle against it like stones in a wall, confident they will not be dislodged.

This act of pre-definition is not a constraint on creativity, but its foundation. A painter primes a canvas. A writer outlines a chapter. A potter forms a mold. These are not limitations but preparations that create the space for the work to happen without accident, without apology. They allow the final piece—the painted stroke, the chosen word, the glazed finish—to be the focus, and not the jarring shift that came before it. We are not just coding for machines; we are crafting an experience. And the first rule of any craft is to prepare your materials, so the final form emerges with grace, and not with a jolt.

Notes & further reading

A few pages I came back to while writing this: