HALL GUITAR SLIDES Available in six sizes A professional slide needs to have a perfect fit. Guitar players come in all sizes, so we have six sizes of guitar slides each just 2 mm apart. The comfort of a Hall Guitar Slide can"t be beat. Available in two Lengths - short and standard. Our best selling standard length slide is 2 1/2 inches (63mm) long. For players who prefer more flexibility, we now offer a short slide that is 1 1/4 inches (32mm) long.