▁based ▁on ▁the ▁intended ▁wear er ' s ▁measurements . ▁Once ▁calculated , ▁the ▁se wer ▁has ▁the ▁measurements ▁needed ▁to ▁cut ▁the ▁cloth ▁and ▁se w ▁the ▁gar ment ▁together . ▁At ▁the ▁other ▁end ▁of ▁the ▁spectrum ▁are ▁ha ute ▁cout ure ▁fashion ▁designs . ▁When ▁a ▁cout ure ▁gar ment ▁is ▁made ▁of ▁unusual ▁material , ▁or ▁has ▁extreme ▁proport ions , ▁the ▁design ▁may ▁challenge ▁the ▁se wer ' s ▁engineering ▁knowledge . ▁Complex ▁designs ▁are ▁draft ed ▁and ▁ref itted ▁do z ens ▁of ▁times , ▁may ▁take ▁around ▁ 4 0 ▁hours ▁to ▁develop ▁a ▁final ▁pattern , ▁and ▁require ▁ 6 0 ▁hours ▁of ▁cutting ▁and ▁se wing . ▁It ▁is ▁important ▁for ▁a ▁pattern ▁to ▁be ▁created ▁well ▁because ▁the ▁way ▁a ▁completed ▁piece ▁fits ▁is ▁the ▁reason ▁it ▁will ▁either ▁be ▁worn ▁or ▁not . ▁ ▁Most ▁cl othing ▁today ▁is ▁mass - produ ced , ▁and ▁con forms ▁to ▁standard ▁s izing , ▁based ▁on ▁body ▁measurements ▁that ▁are ▁intended ▁to ▁fit ▁the ▁greatest ▁proportion ▁of ▁the ▁population . ▁However , ▁while ▁" standard " ▁s izing ▁is ▁generally ▁a ▁useful ▁guid eline , ▁it ▁is ▁little ▁more ▁than ▁that , ▁because ▁there ▁is ▁no ▁industry ▁standard ▁that ▁is ▁" both ▁widely ▁accepted ▁and ▁strictly ▁ad her ed ▁to ▁in ▁all ▁mark ets ". ▁ ▁Home ▁se wers ▁often ▁work ▁from ▁ ▁patterns ▁purchased ▁from ▁companies ▁such ▁as ▁Sim p licity , ▁But ter ick , ▁Mc Call ' s , ▁Vog ue