This is a small and lightweight compass - perfect for wearing on your watch band or on a lanyard around your neck. The face of the compass is 3/4" and on the back it has a sealed strap (open on 2 sides only), so you can run a watch band (up to 3/4" wide) or a lanyard or neck chain through it. This compass is ideal for hiking or biking. It will keep you going in the right direction. * 3/4 Inch Diameter Face With Large, Easy To Read Markings * Compact And Convenient - You Can Carry It Along With You Anywhere * Opening On The Back For A Watch Band, Lanyard Or Key Ring To Slip Through * This Little Compass Is Accurate And Reliable - It Will Keep You Going In The Right Direction * Great For Walking, Hiking, Biking Road Trips, Boat Trips Or Any Kind Of Travel