A magnetic band clasp includes a female clasp assembly of a first band segment and a male clasp assembly of a second band segment. The female clasp assembly defines one or more cavities with one or more magnetic elements disposed underneath. The male clasp assembly includes a projection that may include a magnetic element. Magnetic attraction between the magnetic elements couples the first and second band segments when the projection is positioned in the cavity. In implementations where the female clasp assembly includes multiple cavities, changing which of the cavities the projection is positioned in adjusts a combined coupled length of the first and second band segments.