Yes, those preform containers can last forever, but sometimes the logs just get full! Our friends at Logwerk not only made these handy replacement logbooks, they also printed them on RITR paper, just the way we like them! Each logbook can accommodaťe about 140 happy smiles and even has some simple instructions for finders and muggles! Logwerk logbooks are printed on Rite in the Rain® paper. There are 70 strips attached with a nickel fastener, allowing space for 140 logs. Measure approximately 4.8cm long x 1.6cm wide.