To search for costume design in the library catalog, try the following search words:
costume OR clothing
When searching, it helps to have a time period and/or a country/region. For instance:
" 15th century" AND France AND (costume OR clothing)
Renaissance AND England AND (costume and clothing)
Newspaper and periodical databases can often be used to obtain images of clothing, hairstyles, and cosmetic from different errors. Here are a few databases that can be used for that purpose.