The case for this fits in my purse, a diaper bag or just about any pocket on our stroller. It's so convenient! Plus i love that as my baby grows I won't need to buy another pair of sunglasses, I can just change the band. I ordered a different brand originally and the band didn't get small enough for my baby, who hates the bright summer sun in her eyes. So I returned them and am very happy I did. These were much better and less than a dollar more in cost.