This is So Quintessentially French, the delicacy of the lace and the fineness of the cotton, this was stitched by hand for a bride's trousseau. 
A delight for any French boudoir!
The lace is generally in fine condition with only a little thread damage near the monogram, as shown in the photograph.
I must point out there is a mend on the reverse, for many this does does not distract from the charm of a vintage item, valued linens would be mended or reused rather than thrown away. 

Measuring 70 cm square,  it fits a standard French square pillowcase. 

Delicate trousseau lace edged monogrammed French pillowcase.