Gallica is an invaluable online resource with an abundance of digitized French media, including fashion magazines such as Femina and Les Modes. Most material is keyword searchable, making it incredibly easy to locate information on your favorite designer or fashion house. Another plus, many of the images are high resolution! Start your searching here: http://gallica.bnf.fr
Some fashions from the May 1925 issue of Les Modes are featured below:
View the entire magazine here: http://gallica.bnf.fr/ark:/12148/bpt6k6106446p/f1.image
Gallica is my favorite digital library. So lovely images of old times !