The invention relates to a combination of ski boots of various sizes and skis with a fitted binding, comprising a toe jaw and a heel jaw, the relative separation of which may be altered and fixed relative to the ski by means of a guide device arranged on the ski. The ski boots belong to at least two ski boot types (1, 1′, 1″), which differ in the length of the sole (a, b, c), each of which are suitable for the fitting of inner boots (3a to 3d, 3′a to 3′d, 3″a to 3″d) in at least two boot sizes. The skis comprise binding jaws, arranged to be adjustable such that the relative separation thereof may be matched to the differing lengths of sole, whereby markings on the types of ski boot and markings on the guide device of the binding permit an unambiguous matching of the sole length to the corresponding jaw separation.