New Black Leather Velour Gold Hardware Fuselli Accordion Shoulder Straps Width (8cm / 3.1in) Length (85~105cm / 33.5~41.3in)

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.