I have worn ear plugs at work for 35 years and there are different styles and sizes. For me the best i've used other than custom moulded ones i have are the orange ones with a smooth surface, just went into the garage to see if i could find the make but can't find the packet they came in.
3M make a yellow kind called Taper Fit 2 and are comfortable too.
Not all earplugs are the same diameter, normally one size fits all. I had a workmate whose ear canals were huge and he never rolled them up he just slid them in. Needless to say he lost a lot of his hearing over thirty years in a power plant. Come to find out different diameters are made. You HAVE to roll them up and have them expand while pushing the plug in. If they just slide in you need the larger size.
