All of those details are free handed.
Looks like I dropped the ball and never shared details about what I used to make the costume.
I compensated by cutting the front and back of the leg pieces taller.
How to Make an Oshawott Costume
The pattern basically has 4 rounded triangles that you sew together to make the round top part and then a band with the ear flaps.
Description: It worked pretty well because it was flexible but had some shape.