Need a leash with a small clasp

I just adopted a 13-lb dog. If I use a leash with a heavy buckle, it hangs down and the leash constantly gets tangled in her paws. I have a 3/4" wide, 4' long leash that I like, but her training class requires a 6' long leash. All the ones I have seen either have the right width but a heavy clasp, or are too narrow but have the right weight clasp. For reference, the leash I like has a clasp that's about 2" long.

Any ideas on where I can find a Goldilocks leash!?

Edit: Looking for nylon or cotton, I don't like leather or biothane.