I went to REI to look for paracord in different colors and found a cheap collar on clearance for $1.28 and used the hardware off of it.
My wife has trouble attaching the leash since she only has the use of one arm. I'm always looking for simple solutions and I saw a "D" ring turned sideways on a collar, then found this one. I think it's aluminum so I can transition it to a new collar when he gets big and it should still hold.
I've been thinking about going back and grabbing the other 3 or 4 on the shelf. The collar itself sucked and was only 15" fully extended. (medium) It was too stiff with all the hardware on it. I can see why it was on clearance.