Sorry for the late response, crazy busy today.Hmmm, that could be an issue for me as I’m pretty narrow through the shoulders. Would you mind two more questions? Can you measure the width of the strap, and does the base of your bag have a seam running down the centre or is it smooth? I’ve found a preloved Duplex but I know nothing about the brand and it has a seam on the bottom. None of the others I've been able to find pics of has a seam. Its also suspiciously cheap...many thanks for the help!
No seam running down the center of the base. Please see picture of the side meeting the base. The strap at its apex is 1 5/16” or 33.33mm or 3.33cm