See
this post on TGR for a discussion of 180cm vs 188cm sizes for different Ripstick 106 versions and later posts in that thread for Ripstick 96 Black Edition reviews including my posts about measured specs and sizing for the 96.
From my measurement of the 2022 Ripstick 96 Black Edition and the measured lengths listed in various Blister reviews of the Ripstick
96 and
106 they are 3 to 4 cm shorter than claimed, at least for the 180/181cm and 188cm lengths. However the latest 2022 Black Edition is stiffer than earlier versions which may help compensate for the shorter than listed lengths.