Transaction cards having one or more folds therein for compact and easily stored fobs are provided. Moreover, foldable fobs are provided having one or more holes or apertures therein for holding key chains, or other devices for attaching the fobs to other items, such as sets of keys, wallets, or other items. Other embodiments include spring-loaded clips on the foldable fobs and protective sleeves, housings or cases for full-sized and smaller-sized cards. Still further, fob systems are provided comprising a case or housing for holding and/or storing foldable fobs therein, such as foldable fobs having a dimension, such as a length dimension or a width dimension, that is smaller than traditional-sized fobs.