Hi Emma
OS doesn't have a size chart as the bridle cover a range due to them being adjustable. If you send me your horses measurements I can forward them with your order to ensure the bridle fits your horse.
The Negro/Taupe bridle I belive has a dark brown crystal in the browband. I can forward the picture with your order to OS and they can make the bridle as pictured. The reins will of course match the color of the bridle. The Noseband is XL with crank which is 5cm lightly tapering at the sides with patent.
Thank you,
Katja