oth ▁in ▁back . ▁The ▁rok ush aku ▁fund oshi ▁is ▁a ▁length ▁of ▁cloth , ▁the ▁dimensions ▁being ▁one ▁sh aku ▁▁ ▁( 3 0 . 3   cm ▁/ ▁ 1 1 . 9 3   in ches ) ▁wide ▁and ▁six ▁sh aku ▁( 1 . 8 1 8 ▁m ▁/ ▁ 7 1 . 5 8   in ches ) ▁long ; ▁roku ▁is ▁Japanese ▁for ▁six , ▁hence ▁roku - sh aku . ▁The ▁fund oshi ▁is ▁often ▁tw isted ▁to ▁create ▁a ▁th ong ▁effect ▁at ▁the ▁back . ▁ ▁It ▁was ▁also ▁the ▁standard ▁male ▁bath ing ▁suit . ▁ ▁Male ▁children ▁learning ▁to ▁sw im ▁during ▁the ▁early ▁ 1 9 6 0 s ▁were ▁often ▁told ▁to ▁wear ▁this ▁kind ▁of ▁fund oshi ▁because ▁a ▁boy ▁in ▁trouble ▁could ▁be ▁easily ▁lifted ▁out ▁of ▁the ▁water ▁by ▁the ▁back ▁cloth ▁of ▁his ▁fund oshi . ▁ ▁The ▁third ▁style , ▁called ▁Et ch ū ▁fund oshi , ▁which ▁origin ated ▁in ▁the ▁vic inity ▁of ▁Toy ama ▁Pref ect ure , ▁is ▁a ▁long ▁rectangle ▁of ▁cloth ▁with ▁t apes ▁at ▁one ▁narrow ▁end . ▁Et ch ū ▁fund oshi ▁is ▁a ▁length ▁of ▁cloth , ▁however ▁it ▁has ▁a ▁strip ▁of ▁material ▁at ▁the ▁wa ist ▁to ▁form ▁a ▁fast ening ▁or ▁string . ▁The ▁dimensions ▁are ▁ 1 4   in ches ▁width ▁by ▁about ▁ 4 0   in ches ▁length , ▁and ▁it ▁is ▁tied ▁with ▁the ▁material ▁strip ▁in