This litter bag dispenser is made to be perfectly compatible with Pet N Poop brand dog/cat litter bags (https://www.amazon.com/stores/PETNPET/page/BC868F33-7A1B-4864-89CA-3077CFE17F4B?ref_=ast_bln&store_ref=bl_ast_dp_brandLogo_sto). The dispenser is large enough to house a fresh bag, hosts a centered pillar to keep the roll in place, and has a pronounced arch along the edge of the dispensing slot to catch the perforated edge of the litter bag.
The author remixed this model.
Original model was too narrow to fit the brand of litter bags I had purchased. I increased the diameter of the dispenser, added a central support pillar to keep the roll in place, and added a catch to assist with tearing the bag along its perforated edge.