Ahhh,
Ultramod Mercerie, a photographer's buffet for sure. Mary took me to this treasure trove late one afternoon after a long day, and I was pretty tired, but took one look at the window and perked right up.

The mercerie has every imaginable ribbon, thread, button, trim, fringe etc. stacked to the ceiling. A step back in time to somewhere between 1860-1880. The family finally sold it in 1990. Today I'm fairly certain that it looks very much as it did when they opened. The old wooden drawers and shelves make it even more charming. Across the street is their vintage hat shop. We'll visit it another day.
Ultramod Mercerie
3 rue de Choiseul
75002 Paris
Métro: Quatre-Septembre