The purpose of this study was to develop a test that measures spatial skills relative to product development and apparel design. To provide some support for content validity, the test included components of spatial products, spatial storage, and spatial thought. As evidence of the type of spatial ability measured by the test, an established test that measures spatial relations (Differential Aptitude Test-Space Relations) (DATSR) was correlated with the newly developed test. To provide preliminary statistical data regarding the test, a between-subjects design study was conducted with clothing construction/patternmaking training (none, some) as the independent variable. Dependent variables were the Apparel Spatial Visualization Test (ASVT) and the DATSR. To evidence content validity of the test, scores on the ASVT should reflect improvement in spatial abilities as a function of training. Students with some training scored higher on the ASVT but did not differ in their scores on the DATSR compared to those with no training. This provides some evidence that the ASVT measures spatial skills specific to apparel design and product development. The ASVT and the DATSR were not significantly correlated.