I have not seen this shape before in a trinket box. It occurred to me that this might be a vesta? It appears to have a heart shape at the top and then tapering. It has a rose closure on the brass trim. It was part of a collection of trinket boxes I purchased some years ago. I am listing a number of them now.
Country of Origin: France.
Medium: Hand-Painted Porcelain.
Size: Approximately 4 1/4 inches long by 2 1/4 inches wide (at the widest) by 5/8 inches deep.
Signed: "Limoges, France" on the inside of the top lid.
Condition: Very Good. Closes well. Presents beautifully.
A very kind browser has written that this could be a case for the small sewing scissors.