Greenbrier International Molded Plastic Ponies

4.25″ unipeg:

2″ unipeg baby:

5″ pegasus:

3.5″ pegasus:

3.75″ unicorn:

4.5″ unipeg w/ 1.5″ baby:

 

4″ unipeg:

1.5″ tall, unmarked but maybe a mini version of these:

5″ rearing pony: