The first image shows the Winged Crystal Dragons which are 32cm long.
 
The third image shows the following:
Rose Dragon 35cm
Phoenix Dragon 33cm
Coral Dragon 45cm
 
The fifth image shows the Mdm and Large Blade Dragons, which are the only dragon's whose mouth opens.  They measure 35cm and 42cm respectively.
 
The final images show the Lunar Dragon which measures 42cm.