Dimensional stability is one of the fundamental issues from customer point of view due to after use changes of length and width of garments hinder the proper use ability of garments. The paper is to investigate the change of dimensional stabilities and their association and difference with different selective synthetic fibres constituents. Fabrics and their adjacent garments samples are washed with detergent and the changes of length and width are measured in respect of previous dimensions. A sample of 50 repeated measures was conducted to measure the dimension change. Then the data was processed using software – Statistical Package for Social Science (SPSS) to determine the association and difference. It is revealed that there is significant association with viscose fibre composition and change of length after 1st and 3rd wash as well as change of width after 3rd wash at fabric stage. However, at garments stage, there is significant association with viscose fibre composition and change of length after 1st wash as well as with change of width at 3rd wash. 1st wash of fabric and garments significantly differ with its 3rd wash, however, there is no significant difference between fabric and garments after the same wash.