These tiny sub micro servos are suited for backyard flyers and other lightweight models.
Items [1]
eRC SubMicro Servos
Hitec SubMicro Servos
New Hobby Express Product!
HS-55 Sub Micro Servo
Price: $10.99
Qty 
Product# HRC31055S

Spektrum/Eflite SubMicro Servos
Other SubMicro Servos