suggestions about purchasing a rabbit harness/leash

Hello,

I recently adopted a bunny and am keeping it in an open cage primarily in my bedroom. I want to be able to bring it on walks outside but I figured I would need a harness and leash to do so.

Does anyone have any experience with owning rabbit leashes and have any suggestions about what kind of leash I should get. My bunny is fairly large so I'm concerned that any leash I get will not fit.

Thanks!