The studies from Parcells et al. (1999) and Gouvali and Boudolos (2006), show 0% and 5.8% of students with desk clearance problems, this differ- ence can be due to the match equation considered. In this particular study, the considered match criterion for the SDC was the TT plus 2 cm. This criterion was used because the main objective was to compare the ‘‘real’’ classroom furniture dimensions. As mentioned before, most of the students were using a high seat; therefore the knee height will be lower than the Seat Height plus the TT.