5 mm jack and it comes an additional connector for PC. It fits perfect! The noise cancelling just isnt nearly as good as, for example, any Bose active noise cancelling headphones. I found these soothed my feet when I was on my feet all day. I had been wearing quilted slippers and they would not hold up for any length of time, these slippers are so well made, and comfort is NOT slighted, that I look forward to wearing them for some time. the build quality is shocking)Hit me up on insta for more info, or if youre down for some games: i_phasma_i The earbuds we’ve tried in the past ranged between $10-$25 each. The earbuds pair well, they sound amazing and they do a great job of cancelling outside noise so you can hear clearly. I gave this 4 stars because as it turns out I’m not a huge fan of the foam consistency. You can also see that its 2 pieces (second photo), this makes it very easy to open and close.