card: 5.00" x 3.50" 
127.82 mm x 89.03 mm

paper: 3.50" x 2.42" 
88.41 mm x 61.39 mm

stone: 3.19" (18.25" with string) x 0.95" x 0.62" 
81.11 mm (463.55 mm) x 24.19 mm x 15.67 mm