A definitive study of the sizes of documents in the ERIC Data Base is reported by the ERIC Processing and Reference Facility. This is a statistical and frequency distribution study encompassing every item in the file whose record contains pagination data in machine readable form. The study provides pagination data that could be used by present and future EDRS contractors and bidders and, since it is one of the few such comprehensive analyses ever performed on a data base of this size, it provides useful data for the entire information science community. The 36,314 records analyzed constitute virtually the complete ERIC Data Base through June 1971. The data are displayed in two formats: Tables and Graphs. The raw data from which these displays were developed were obtained from detailed computer printouts. (Author/NH)