What do the "raised", "lowered", "short" and "long" shape options refer to?
Raised/lowered ("Deluxe seats" and "Designer style seat covers"): this means that the height of the driver's seat is raised by about 3 cm, or conversely, lowered by about 3 cm, with respect to the standard driver's seat height (corresponding to the height characteristics of your original seat).
The height of the passenger seat is never affected.
Short/long ("Deluxe seat" only): along these same lines, it has to do with the positioning of the backrest between the front and rear seats of the saddle, in that it may be shifted forwards or backwards by about 3 cm, so that the driver's seat may be shorter or longer than in the standard form of the Deluxe seat. The total seat length is never affected in any case.
Drivers of all builds will be able to choose from one or all of these options depending on their needs, e.g. in order for their feet to touch the ground comfortably, or for them to sit closer to the handlebars or further away from the petrol tank.