Review on Cable Matters 100-Pack 8mm Strain Relief Boots: Black, Ideal for Large Diameter Cables by Angel Scully

If your cable category doesn't match this boot, don't worry. Not all 6 or 6A cables are the same gauge. So use the specified hole size as a guide. The jacket material is so inflexible that it does not work without problems with larger cables. If your cable is smaller, it won't stay where it should. The worst: the material is not flexible, so unlocking the RJ45 is much more difficult, especially in a hard-to-reach place.