The Gnome Reaper cutter measures 4 x 4" at the widest sections.  Cookie size is roughly 3.75 x 3 inches. The beard and scythe add a little extra to the overall dimensions. 

Hand wash only in warm, soapy water. These cutters are not dishwasher safe as they can melt and warp the design. Basically, keep away from high heat or bad things happen to good cutters.