New Black Leather Fuselli Extra Long Accordion Shoulder Strap Width (2cm / 0.75in) Length (100~115cm / 39.5~41.5in)

Width: Measured from widest part of lining. 
Length: Measured from the shortest to longest possible adjustment from ends of loops on the longest assembled strap.  Note that the second assembled strap is 5 cm (2 inches) shorter.  The longer strap is for the right arm;  the shorter strap for the left arm.