These elastic neck extenders give you extra breathing room in the top collar of your favorite dress shirts and pants. The elastic loop blends in as a normal button in its appearance,makes you looking sharp but also comfortable. These 15mm button extenders big enough and suit for you shirts trousers coats, hidden under your neck tie or belt, not noticeable.No one else will find out it.Not pop out easily,keep shirts stay fixed, give you reliable trust and make your neck wrist comfort.