I had trouble choosing a carry case for the Sigma 150-600mm f5-6.3 Sports DG DN OS as I was unsure of actual sizes.
As it turns out the Lowepro Pro Trekker BP 450 AW II backpack accommodates the lens well and the case is comfortable to wear.
I thought it may be of interest to others who may specifically have this lens. There are plenty of reviews about this backpack if you want more info on it’s other attributes.