Cliff’s Bugger Beast is 13″ x 9″ x 3″ the Beast Junior is 10″ x 6.5″ x 2.75″. The boxes are lined either side with a time tested, hook gripping, slotted blue high density foam that will allow you to slot flies in and lift them out over and over again without damaging the foam. The SP Leaf fits the Bugger Beast.