5mm headphone jacks from seating properly. Just dont be dumb like me and order it for an extension to a Mic/headset combo. Reduced from 5 to 2 stars. I was disappointed by the cheap craftsmanship. I like the color choices for this brand better. A 40 may be a little more comfortable to give me wiggle room with my orthotics, but they dont come in half sizes and my feet arent squished in a 39. Great product, quality build, and compact design. They are super comfortable and I just hope they last. Overall I am obsessed with this dress! The lather and clean feeling from these products is phenomenal!