Well after what seems like hundreds of emails getting dimensions I have finally designed an excellent universal fit quick release solution. (Hand or shoulder strap may be purchased separately for use off of the bike) Bag features a tail light strap as well as an elegant closure system. Constructed with rivets and Chicago screws for maximum durability. Would make an incredible gift for the cyclist in your life. Bag offers easy access to items when it is on or off of the bike.
It is my opinion that the saddlebag straps on many Brooks saddles are insufficient in size to allow for the use of thick durable strap leather. I also feel that the angular and near sharp edge of the saddlebag tab is not a good platform to bounce leather against all day.
Bag measures 7"x4"x4" and has been finished with a wax finish and three coats of conditioner for water protection. It is almost always a good idea to recondition any leather item after it is drenched. The same goes for saddles and bar tape. A little maintenance goes a long way. If you have a garage; you win!
May be maintained with this conditioner:
Bag is in Saddle Tan and is pictured with a 10 year old Brown saddle and had not been made for this bike.