Tiddler story sack set 
 
This is a bumper set of 12 pieces 
 
They are roughly proportionate if it's possible in a set, but are taking into account how they need to be a good size to hold, and not too small that they are fragile. You can see in the photos to get an idea of the sizes compared to eachother in your choice of set
The mermaid and seal are approx 18cm and the crab approx 8cm 
You get 
Tiddler, Johnny dory, squid, seahorse, seal, dolphin, turtle, crab, (two types) lobster, stingray, mermaid