Answer
Oct 23, 2023 - 07:00 AM
In most cases, when referring to a 10-inch globe with a 4-inch opening, it means that the neck-less opening (where the globe attaches to the fixture) is designed to accommodate a fixture with a 4-inch fitter.
This does not necessarily mean that the exact outer diameter of the opening on the globe is 4 inches. The 4-inch measurement typically refers to the size of the fitter, which is the metal collar on the fixture that holds the globe in place.
The fitter is where you would attach the globe, and it's important that the fitter size matches the globe's opening size. The actual outer diameter of the opening on the globe may be slightly smaller than 4 inches to allow for a secure fit within the fitter.
However, it should be close enough to 4 inches that it fits properly without falling off or being too loose.