Measures 9-7/8" at longest point. Your one bid buys one pair. One pair will complete one drawer. This is a 3/4 extension slide, meaning 6-1/2" of drawer will come out. So the slide extended at its longest point is a total of 16-1/2". These slides have a built in height adjustment for easy installing as well. This is a great deal and shipping is $7.25 on first 6 pair and that is a one time flat fee. E-mail me with any questions you may have and on orders above six pair.