YKB/540/BB2 - Yale Key Box Organize and secure your keys. Choices of 2 sizes to fit for 20 or 46 keys. Number tags and labels are provided to make it easy to find the right key. Size (Medium) Exterior Dimensions: 300x240x80mm Also available in Small size "YKB/200/BB2" Exterior Dimensions: 200x160x80mm YCB/090/BB2 - Yale Cash Box YKB/200/CB2 - Yale Key Box with Combination Lock