The interior of this shop is even more charming than its windows.  We found this charming mercerie (haberdasherie, notions store) with thousands of buttons, ribbons, silks, hats, feathers as we wandered out of Passage Choiseul. 
In looking for more information, I discovered the wonderful history recounted here by Colleen of Colleen's Paris.

One thing is certain, at every turn you can uncover a story in Paris.

3-4, rue de Choiseul
75002, Paris