I don't know exactly how you would walk a beardie. They're not dogs. They make leashes(in my opinion are kind of silly) for beardies, I think they are more to keep your beardie from running away.
If it's exercise you want for your beardie I suggest you let him run around on the floor, with your supervision of course.
We use leashes for Dante and Randal so they don't run away when they're outside
But we also let them run around the house during the day without leashes.
I made one for Bogie like the one Chloe is wearing. I used a scrap of suede for the harness and a swivel clip on a ribon for the leash. It keeps him from running off when he goes shopping with us. Make sure it is snug- they are great escape artists. I should have named him Houdini! :lol: