One of my favorite souvenirs to recommend to clients is French linens. Tea towels are especially nice, as you don't necessarily have to match someone's kitchen exactly, and they are light and easy to pack! They can also be used as hand towels in a bathroom- and I've always thought that a few together would be an adorable kitchen curtain. Each season, many of the big brands come out with new designs and colors, like Monsieur Rabbit, above. Classic neutrals are always a good bet as well, or why not go more touristy with an Eiffel Tower version? The classic Le Jacquard Francais models can be found in all big department stores, and Sylvine at La Maison Ivre has an amazing collection of French linens in all colors and sizes.