Antique French stencil roller for marking trousseau linen with a design to be embroidered.  The roller would be primed with washable ink and then the design rolled over the fabric to leave the guidelines for Mademoiselle to follow. 
The rollers are in good condition for their age, with a little loss of the rubber in one area on the larger, this is clearly pictured.

The larger is approximately 7" and the smaller 6"

Antique French linen embroidery roller