An adjustable buckle for a band in which a plate is telescopically held within an open end housing containing a ratchet and a second plate is hinged to and foldable over the first plate and releasably securable thereto in folded over position and is provided with a hook at its end for engagement of the other end of the band. A pawl is secured to the first plate by a resilient arm which normally maintains the pawl out of engagement with the ratchet. The second plates is provided with a projection which engages the pawl to press it into engagement with the ratchet when the second plate is folded against the first plate.