Packaging is still designed the way it was designed thirty years ago: as a physical object, reviewed at full size, printed as a proof, held in the hand, discussed around a table with the sample in the middle. That review is necessary and it is no longer sufficient, because most of the occasions on which the pack does its work now happen at a size it was never assessed at.

Consider where a pack is actually seen. On a marketplace listing at a few hundred pixels, next to eleven competitors. In a retailer's app, smaller. In a distributor's PDF catalogue, one of forty products on a page. In a photograph taken on a phone by a broker and forwarded on WhatsApp. On a slide in someone else's presentation. In a search result. Only a minority of these encounters involve the object.

At full size, a pack can hold a hierarchy of six elements: brand, product, variety, weight, a claim, an origin. At thumbnail size it holds two, sometimes three. Everything else becomes texture. This is not a matter of taste; it is a property of the eye at that scale. A pack designed for six elements and encountered at two-element scale does not communicate a reduced version of its message. It communicates an indistinct block of colour with something written on it.

The practical consequence is a hierarchy decision most companies never make. Which two things must survive? For a company with a recognised name, the name and the variety. For an unknown company in a functional category, often the product and the benefit, with the name growing into the position later. There is no universal answer, but there is a universal cost to not choosing: at small scale, an unranked design ranks itself, usually by whichever element happens to have the highest contrast.

There is a second and less obvious effect. On a physical shelf, a range is seen together, and coherence across SKUs does a large part of the work — the block effect. In a digital listing, products are usually seen alone or beside competitors rather than beside their own siblings. A range whose variants are distinguished only by a subtle colour shift reads perfectly on the shelf and becomes four unidentifiable near-identical listings online, where customers order the wrong variant and return it. The two environments demand different things from the same design, and the design has to serve both.

Then there is the crop. Marketplaces, apps and comparison sites impose their own square, their own white background, their own aspect ratio. A pack whose composition depends on the full front panel — a photograph bleeding to the edge, a mark positioned relative to a curve — arrives cropped in ways nobody approved. The elements that must survive should sit inside a zone that survives any crop.

None of this argues for designing packaging for the screen. A pack that works only as a thumbnail is a poor object, and the physical encounter is still where the highest-value judgement is made — at the shelf, in the buyer's hand, at the show. The argument is for adding one step to the review that costs nothing.

Print the pack at the size it appears in a listing. Put it on a screen at the size of a marketplace tile, beside four competitors. Look at it on a phone, held at arm's length, in the light of a room rather than a studio. Ask two questions: can the company be identified, and can this specific product be told apart from its own siblings?

Most packs fail one of the two, and the failure is usually cheap to correct at the design stage and expensive to correct after twelve months of print inventory.

The deeper point is about where the buying decision has moved. A category buyer researches a supplier online before meeting them and after leaving the stand. A consumer sees the pack on a screen before seeing it on a shelf, and often instead of ever seeing it on a shelf. The pack has become the company's most widely distributed image of itself, encountered in conditions the company does not control and mostly at a size at which it was never evaluated.

Designing for the table and hoping it survives the screen is the wrong order. The screen is where most of the encounters now happen.