They fit my G4 Kirby perfectly. Some other commenters have mentioned that the pockets don't fit properly on the Nozel. This is because these bags do not have cut outs to attach to the nose piece like the Kirby brand bags. Instead they have a perforated cardboard ring around the rubber spacer that allows the bags to be used on other machines. It simply means that you have to put a gasket over the nipple for it to fit and seal properly. Very few inconveniences for the price compared to Kirby brand bags.