noun, noun which may take the genitive case particle 'no'
business-card size
Used to describe something that is roughly the size of a standard Japanese business card (about 91×55 mm). Often appears as 名刺大の～ or 名刺大で～.
Print cards that are business-card size.
Please reduce the photo to business-card size.
Compound of 名刺 (business card) and 大 (size). The reading だい is the on'yomi used in size-related compounds.