From Longman Dictionary of Contemporary Englishpre-shrunkpre-shrunk /ˌpriː ˈʃrʌŋk◂/ adjective TIMDCCpre-shrunk clothes are sold after they have been made smaller by being washed → shrink pre-shrunk jeans
Examples from the Corpus
pre-shrunk• It is prone to shrinking and should be pre-shrunk during the manufacture to make it a good buy. 