Jill Myslinski from Acorn Market shares a free pattern at Sew, Mama, Sew! for making her kimono dog harness. It works like the nylon webbing style harnesses you can buy in the store, but made cuter and softer out of a fabric print. The pattern she gives was made to fit her 10 pound Pomeranian/poodle mix. If you needed, I’m sure you could adjust the size larger. Get the tutorial.
[photo from Acorn Market on Sew, Mama, Sew!]