The Precison Skydive Log book is one of the most popular logbooks on the market and provides space for two entries per page. This Measures 8.5 x 5.5 inches and features a protective plastic/vinyl cover with sturdy wire binding and high quality paper. It fits nicely in most nylon logbook covers. This logbook includes a freefall table chart, personal record, and other useful information. It accommodates two jumps per page and 300 jumps per book.