It's a very tight sleeve and since it's leather there's no give to it. Got one for a pair of glasses identical to the ones in the image. It seems mine have thicker arms or a wider curve or something. By trying to fit them into the leather case the arms of the frames are now too loose and due to the nature of them can't tightened. At first I thought maybe I'm putting them in the wrong way and it should be at a different angle? Nope. Will find another use for the case.