New Black Leather Velour Italcinte Accordion Shoulder Straps Width (8cm / 3in) Length (107~122cm / 42~48in)

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 10 cm (4 inches) shorter.  The longer strap is for the right arm;  the shorter strap for the left arm.