Show product scale without inventing dimensions
Product scale needs evidence when size is part of the message. A bottle that looks small beside a generated hand has not been measured. Keep exact dimensions unknown until the merchant supplies them, and avoid writing copy that turns a visual impression into a fact.
Separate three kinds of size information
| Information | What it can support | What it cannot establish alone |
|---|---|---|
| Merchant-supplied measurement | An approved dimension statement, with units | How every generated frame will reproduce it |
| Real photograph beside a known object | A visual comparison in that actual view | A new exact dimension inferred from perspective |
| Generated hand or room | A plausible scene to inspect | Proof of capacity, fit or measured size |
For a hypothetical ceramic cup, the merchant supplies front and handle photographs but no height or volume. The ad can introduce its shape and handle. It should not call it a large coffee cup or show a measured fill as proof of capacity.
Prepare a useful comparison photograph
If the merchant can provide a size reference, ask for the actual cup beside a ruler or a clearly identified comparison object on the same surface. Keep both objects fully visible. A tilted view or different distances from the camera can make an apparent size ratio misleading.
Record any supplied measurement exactly, including units, and keep its source in the production brief. Do not silently round or convert a guessed number. If the size is not important to the ad's message, leave it out of the script.
Write proportion cues conservatively
A supported direction might be: “Use the cup's photographed proportions and handle opening. Keep it on the table; do not exaggerate its height beside the creator.” That helps the production assignment without claiming that a generated person is a calibrated scale reference.
For a handle-focused concept, choose a framing that shows the handle and cup together. An extreme close-up can make a small item look large and detach the feature from the whole object. The detail guide explains how to retain that relationship.
Review scale through the action
In fairytale, upload the sources and select the scene. Missing sheets from uploaded references are prepared with the paid video request when needed. Check the Generate quote and any proposed dimension line before starting.
After rendering, compare the cup's proportions at the start, during the lift and at the set-down. Does the handle shrink when the hand touches it? Does the body grow as it approaches the camera beyond the expected perspective change? A smooth clip can still misrepresent the object.
The ceramics-ad guide covers related shape and glaze checks. If a measured size is essential to the campaign, retain real measurement evidence rather than relying on the generated scene to supply it.