This is a side pull hackamore bitless bridle that you can order in small pony or large pony size. . It is a side pull "with a whoa" which means it tightens on the nose when the reins are pulled back. If you dont want it to tighten, you can hook the reins to both rings. The small pony will fit a sheltand pony or miniature hore. The nose lets out to 17" and the headstall lets out to 30". It is very adjustable with roller buckles. This item is hand braided from the finest 550 nylon paracord. You can take the side pull off of this bridle and add a bit to it. You can choose at checkout whether to get the bitless bridle only or to add the reins. The large pony size will fit your typical welsh pony. The nose lets out to 21" and the headstall out to 39".