A: Hi 003 - We're glad you have your eye on this one-of-a-kind napkin holder! The additional dimensions are as follows: 5.5 cm (slot width top), 3.2 cm (slot width bottom), 1 cm (wall thickness side top), 1.7 cm (wall thickness side bottom), and .9 cm (wall thickness top of holder). We hope this helps! - Gao