A little refresher on measuring the correct size of globe to order.  We get a lot of questions on how to determine the diameter of a globe.  If you have an existing globe that you want to replace or match, you measure around the circumference and divide by 3.14 ( remember pi from your math classes?)  this will give you the diameter.  If you don't have an existing globe we suggest you make a circle with a string to the size that you want measure and divide that by 3.14.  The most important measurement is the size and type of the bottom of the globe that will fit your fitter.  More on that later.