Anything from 1920-1929 will be perfect. Can reuse previous clothes and add 1920’s accessories. Men can buy or reuse suits and add 1920’s accessories as well. You can thrift, buy used or new. Here are some links to get inspiration and or buy. Women: https://babeyond.com https://flapperboutique.com/collections/flapper-dresses?srsltid=AfmBOoqPr5lyAPPnbIVuPlQYtAcAcobJAVraC87W_EWvmZum56bgTo4T Amazon Men: https://happygentleman.com/en-us/collections/1920s-suits?srsltid=AfmBOoqoCxtmHZ-hAz3Bd9-UBc2t4UtaaSkSLGZa9j6rQfadL6QEL5r2 https://babeyond.com/search?q=1920s+men https://www.hockerty.com/en-us/men/1920s-suit/ Amazon
Any color will do! Have fun with it. Just no white please. White incorporated patterns are okay