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Series, combination of series and method to produce sports shoes of different size, in which each sports shoe of different size comprises a casing substantially rigid and defining an internal compartment for containing the user's foot, a sole associated below the casing and an inner boot disposed in

Series, combination of series and method to produce sports shoes of different size, in which each sports shoe of different size comprises a casing substantially rigid and defining an internal compartment for containing the user's foot, a sole associated below the casing and an inner boot disposed in the internal compartment, in order to make putting the foot into the casing more comfortable. The sole has always the same length for all the sports shoes, and the casing has a different size to each other so as to define, on each occasion, an internal compartment with a different volume for each of the sports shoes of different size, so as to cover a plurality of foot sizes, within a determinate range, keeping the length of the sole always the same.

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1. Combination of two or more series of sports shoes of different size, wherein each of said sports shoes comprises a casing substantially rigid and able to define an internal compartment for containing the user's foot, a sole associated below said casing and an inner boot disposed in said internal

1. Combination of two or more series of sports shoes of different size, wherein each of said sports shoes comprises a casing substantially rigid and able to define an internal compartment for containing the user's foot, a sole associated below said casing and an inner boot disposed in said internal compartment, in order to make putting the foot into said casing more comfortable, wherein in each of said series said sole and said casing together comprise a single integrated molded body, and said sole has always the same length, longer than said casing, for all said sports shoes of different size, and said casing has a part modified in a front segment or a rear segment with respect to said casing of a shoe of the same series, to provide a variation in thickness or inclination of the tip of the casing or a variation in thickness or inclination in the heel part of the casing, a different size to each other so as to define, on each occasion, an internal compartment with a different volume varying in a discrete way, for each of said sports shoes of different size, so as to cover a plurality of foot sizes, within a determinate range, keeping the length of said sole always the same. 2. The combination as in claim 1, comprising four series each comprising three sports shoes of different size, wherein a first series comprises three sports shoes of different size having a sole with always the same length (L1) comprised between about 285 mm and about 290 mm for all three sports shoes, and three respective casings defining respectively a first internal compartment for a first sports shoe with a usable internal length equal to about 235 mm, a second internal compartment for a second sports shoe having a usable internal length equal to about 245 mm, and a third internal compartment for a third sports shoe having a usable internal length equal to about 255 mm, a second series comprises three sports shoes having a sole with always the same length (L2) comprised between about 315 mm and about 320 mm for all three sports shoes, and three respective casings defining respectively a first internal compartment for a first sports shoe with a usable internal length equal to about 265 mm, a second internal compartment for a second sports shoe having a usable internal length equal to about 275 mm, and a third internal compartment for a third sports shoe having a usable internal length equal to about 285 mm, a third series comprises three sports shoes having a sole with always the same length (L3) comprised between about 340 mm and about 350 mm for all three sports shoes, and three respective casings defining respectively a first internal compartment for a first sports shoe with a usable internal length equal to about 295 mm, a second internal compartment for a second sports shoe having a usable internal length equal to about 305 mm, and a third internal compartment for a third sports shoe having a usable internal length equal to about 315 mm, and a fourth series comprises three sports shoes having a sole with always the same length (L4) comprised between about 375 mm and about 380 mm for all three sports shoes, and three respective casings defining respectively a first internal compartment for a first sports shoe with a usable internal length equal to about 325 mm, a second internal compartment for a second sports shoe having a usable internal length equal to about 335 mm, and a third internal compartment for a third sports shoe having a usable internal length equal to about 345 mm. 3. Method to make a series of sports shoes of different size, wherein each of said sports shoes comprises a casing substantially rigid and able to define an internal compartment for containing the user's foot, a sole associated below said casing and an inner boot disposed in said internal compartment, in order to make putting the foot into said casing more comfortable, the method comprising at least a molding step in which each of said sports shoes of different size is made, by means of at least a mold equipment having a first part always the same for all said sports shoes of different size, in which said sole of always the same length (L1, L2, L3, L4) is made, and a second part, modified or modifiable in a front segment and/or in a rear segment thereof, in which said casings of different size to each other are made, defining on each occasion respective internal compartments with a different volume for each sports shoe of different size, so as to obtain a plurality of foot sizes, within a determinate range, keeping the length of said sole always the same. 4. The method as in claim 3, wherein said mold equipment comprises a dedicated mold for each of said sports shoes of different size, and wherein said mold has said second part specifically shaped to define the volume of the internal compartment of the relative casing. 5. The method as in claim 3, wherein said mold equipment comprises a single mold selectively modifiable in said second part by the insertion of suitable inserts, thicknesses, shapes or other, into the front segment and/or the rear segment thereof, so as to define on each occasion the volume of the internal compartment of the relative casing.