Antique circa 1900s porcelain bisque doll heads excavated in Germany. 
In, as found condition (rejects and broken pieces) Great for mixed-media assemblage.
Top 2 in sailor suits bottom 2 a bit more enigmatic.
Q - approx. 1-3/8 w x 2 h x 1-1/8"d  small
R - approx. 1-1/4 w x 1-3/4 h x 1-1/4"d  small
S - approx. 1-1/8 w x 1-5/8 h x 1-1/4"d  small
T - approx. 1-1/4 w x 2 h x 1" d  small