I was looking around online for some deals on long leather gloves and came across this 2013 article from UK retailer Black Co. with five different ways to pair long leather gloves. They range from the traditional pairing with a little black dress to a surprising "grown up biker" look.
These very nice gloves measure about 24.5" and will set you back about $172 at today's conversion rate.
I was also intrigued by this very cool style featuring a diagonal zipper. These measure 17" long.
I don't know about where you are, but it's definitely "long leather glove" weather where I am. Stay warm and in style!