I can stuff the caps in my nostrils with the top peg inside my nose and the other end sticking out of my nose holes. I can also use them caps like a taper and gradually stretch my nostrils until the whole cap inside my nose. How long should i wear these caps in my nostrils to stretch them to a bigger size? Like every night, all night until i wake up? Like you do with a orthodontist retainer?
Maybe you could get a visit a piercing/tattoo studio and ask them about it? I mean, usually stretching involves piercing your nostrils, but they might have some advice on doing so without the piercings.