When I bought Miss Piggy and Kermit in 1977, she was a hand puppet. She had a big vinyl hollow head, (no body) and the famous elbow length lavender gloves with matching dress. I had planned from the start to make her into a doll. I made her a soft body, she felt cuddly and nice to hold.
I carved some platform wedge sandals and added satin straps. (They are in style now) Then I made her a long formal satin evening jacket.
Kermit was just a green frog so I made him a Tuxedo with a pleated shirt, pearl buttons and a cummerbund. I knew it would be what Miss Piggy would want. These two characters have lived at my house, and lived in Sonora, then San Angelo and finally are back with me. (They were Christmas presents that we passed back and forth). They are both in perfect shape, even after 35 years. We watched the Muppet Shows on TV for several years~ Miss Piggy and Kermit were our favorite characters. I loved those shows. Jim Henson, the famous puppeteer who created the Muppets died in 1990 at age 53.