This is an exquisite porcelain lace doll (Lace Doll) made by Sitzendorf. It is about 10 centimeters tall. The Sitzendorf porcelain factory was established in 1850 and is particularly known for its elaborate porcelain lace dolls (Lace Dolls). The figurine in the image depicts a ballerina using Dresden-style lace. The Dresden style is characterized by luxurious frills and decorative designs, which are features of the Rococo Revival style.