My 22" collie grey in hers.
I am really pleased with mine, really well made and not too heavy for either dog.
I would definately get a matching lead as well, really nice to hold with a brass loop on the hand piece to clip onto it self and carry round your neck and under arm.
The big loops and buckels are great for gloved hands and you can run a string threw the loop to slip the dog instead of under the collar it self.
I would'nt go back to the leather ones now.