▁formal ▁occasions . ▁In ▁the ▁early ▁ 1 9 2 0 s , ▁men ' s ▁fashion ▁was ▁character ized ▁by ▁extremely ▁high - wa isted ▁jack ets , ▁often ▁worn ▁with ▁bel ts . ▁Lap els ▁on ▁suit ▁jack ets ▁were ▁not ▁very ▁wide ▁as ▁they ▁t ended ▁to ▁be ▁button ed ▁up ▁high . ▁This ▁style ▁of ▁jack et ▁seems ▁to ▁have ▁been ▁greatly ▁influenced ▁by ▁the ▁uniform s ▁worn ▁by ▁the ▁military ▁during ▁the ▁First ▁World ▁War . ▁Tr ous ers ▁were ▁relatively ▁narrow ▁and ▁straight ▁and ▁they ▁were ▁worn ▁rather ▁short ▁so ▁that ▁a ▁man ' s ▁so cks ▁often ▁showed . ▁Tr ous ers ▁also ▁began ▁to ▁be ▁worn ▁cu ff ed ▁at ▁the ▁bottom ▁at ▁this ▁time . ▁ ▁By ▁ 1 9 2 5 , ▁wider ▁tr ous ers ▁commonly ▁known ▁as ▁Oxford ▁b ags ▁came ▁into ▁fashion , ▁while ▁suit ▁jack ets ▁returned ▁to ▁a ▁normal ▁wa ist ▁and ▁lap els ▁became ▁wider ▁and ▁were ▁often ▁worn ▁pe aked . ▁Lo ose - f itting ▁sle e ves ▁without ▁a ▁t aper ▁also ▁began ▁to ▁be ▁worn ▁during ▁this ▁period . ▁During ▁the ▁late ▁ 1 9 2 0 s , ▁double - bre asted ▁v ests , ▁often ▁worn ▁with ▁a ▁single - bre asted ▁jack et , ▁also ▁became ▁quite ▁fashion able . ▁During ▁the ▁ 1 9 2 0 s , ▁men ▁had ▁a ▁variety ▁of ▁sport ▁clothes ▁available ▁to ▁them , ▁including ▁swe aters ▁and ▁short ▁tr ous ers ▁( comm