Maxillaria rufescens, the Light Fox-red Maxillaria, is a species of orchid native to Trinidad and the Amazon Basin in Colombia, Ecuador, Peru, Bolivia, Venezuela, The Guianas and Brazil. The plant grows at eleveations of 200 to 2000 meters, and grows up to 1 inches (3 to 4 centimeters).
The Maxillaria rufescens is a small orchid.
The context only gives us the size of the Maxillaria rufescens, and not the sizes of any other species of orchids.  We cannot conclude with just this information that 1 inch is small for an orchid as we don't have a reference for the average size of other orchid species.