New Red Alpine Velour Fuselli Accordion Shoulder Straps Width (6cm / 2.4in) Length (65~77cm / 25.5~35.5in)

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.