Have you thought about making your own mermaid tail?
I began making mermaid tails because my four year old daughter loves mermaids, but wasn't a fan of the sensory socks they used at OT. I knew that if she tried one she would love to sensation, but she couldn't be convinced to climb in.
I had a feeling if I turned the sock into a tail that she could wear she would benefit from it. So I started sewing and quickly discovered that my other kids loved the mermaid tails too.
You don't need a pattern to make this mermaid tail. Here are step by step instructions that take you from measuring through sewing, so that you can create your very own custom tail.
To make this tail I used about a yard of spandex, three feet of elastic and a little less than 2 square feet of felt.
The top of the fin usually measure about half the width of the bottom of the tail when I cut out my fin. We'll pleat the tail later so that it matches.
If you have any questions feel free to ask them in the comment section, or email me and I'll answer them as best I can!