Select your size tunnel.
Put your tunnels in both ears. The ones I'm using are clear so it looks like there is nothing there but, there is.
Pick out the smaller sized plugs you want to use.
Take the plug and put it through the tunnels you have in and if you want to make sure they don't fall out, put an O-Ring in the back of your selected plugs.
Now you can wear the plugs you stretched out of!