We live in a society in which things that are larger are perceived to be better. Although a small house would be more realistic to buy based on our income, we may decide to buy a larger house. The book that is 400 pages in length may be judged to be a better book than a book that is only 150 pages in length.
Does the font size affect our judgments of how positive words are? Meier, Robinson, and Caven (2008) found that words presented in a larger font size were judged more positively.
It may be a good idea to use a larger font size when describing a product. However, more research is needed to find out whether font size in a description of a product would influence evaluations of the product.
References
Meier, B. P., Robinson, M. D., & Caven, A. J. (2008). Why a big mac
is a good mac: Associations between affect and size. Basic and
Applied Social Psychology, 30, 46-55.