The description on the website and on the sticker attached to the item, says it can accommodate 2.75" and 3" inch shells. I tried to use it on 2.75" shells that I measure with calipers to be precisely that length, and the box would not close. The height of the box measured with calipers is 2.89" when measured on the outside, so when taking in to consideration the thickness of the plastic, the actual internal height would be smaller. Not sure how they think this fits. Quality of the box is very good, if it fit shells is says it fits.