English to Spanish Medical Medical: Pharmaceuticals Adoption

In the justification document for a change to packing components of some pharmaceutical product, the "blister foot print size" changes its dimensions.
I would translate it as
"tamaño del texto del soporte del blister"
because I imagine it refers to the text in the foil at the back of the blister, described by RAE as the "soporte del blister", but I am not 100% certain.

And you can imagine all I get when I search for "blister foot"... not what I am looking for....

Thanks in advance.