Where does the wall preview get the print size?

• Each variant name holds its size, for example 50x70 cm, A3 or 18x24 inches.Scan the catalog for sizes →
• The variant names do not hold the size, but the product title or description does, for example “Dimensions: 16 x 20 in”.Scan the catalog, then read the sizes from the product text →
• One product has no size, or one variant needs a different size.Set the sizes of one product →
• Many products are sold in the same sizes, and the variant names do not hold them.Set the same sizes on many products →
• Your products already store their width and height in metafields of your own.Connect your own size metafields →

Which size the preview opens at

The preview opens at the first of these that the selected variant has:

1. A size set by hand on the variant, under Sizes per variant.
2. The size in the variant name. A name with no unit is read in the unit under “Sizes without a unit are in”.
3. The Poster size of the product. When you connected your own width and height metafields under Data sources, they give the Poster size.