Abstract: A skate includes a lower base, an upper base adjustably mounted on the lower base, and a control knob mounted on the lower base and detachably locked onto the upper base. The upper base has a slide provided with a plurality of locking teeth. The control knob is movably mounted in the lower base and has a first end provided with a support and a second end provided with a press button protruding from the lower base. The support of the control knob has a locking groove detachably locked on one of the locking teeth of the upper base.

Abstract: A skate includes a wheel seat, a heel hard shell adjustably mounted on the wheel seat, a guide mechanism mounted between the wheel seat and the heel hard shell to guide movement of the heel hard shell relative to the wheel seat, and a size adjustment operation device mounted between the wheel seat and the heel hard shell. Thus, the user only needs to press the locking plate of the size adjustment operation device so as to adjust the position of the heel hard shell relative to the wheel seat, so that the size of the skate is adjusted easily and conveniently, thereby facilitating the user adjusting the size of the skate.