It may have buttons on the sides of the clasp that you must press. If you do not see the buttons on the sides of band, it is a friction fitting, and you must pull on one or the other side of the "butterfly" clasp for it to release.
If you see a large outside clasp, there will sometimes be a fold over safety. This is called a tri-fold clasp. You must pull up the hinged clasp one direction, then the main clasp the other direction. A bi-fold clasp has no safety, and can be pulled one direction to open.
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It may have buttons on the sides of the clasp that you must press. If you do not see the buttons on the sides of band, it is a friction fitting, and you must pull on one or the other side of the "butterfly" clasp for it to release.
If you see a large outside clasp, there will sometimes be a fold over safety. This is called a tri-fold clasp. You must pull up the hinged clasp one direction, then the main clasp the other direction. A bi-fold clasp has no safety, and can be pulled one direction to open.