MINIATURE HORSE / SMALL PONY NYLON BRIDLE RED by PARTY PONIES. $19.99. Adjustable!. Sized for the Miniature Horse or Small pony. Bright, washable colors!. Beautiful double ply web bridle . Current styel has one point adjustment. 8' rein and 3.5" snaffle bit. Measures 32" from bit attachment, around ears, to other side at largest setting. 25" at smallest. This bridle comes in 16 colors and two sizes; Miniature Horse/Sm Pony or Pony size.