The aim of this study was to understand the crimp extension stage of yarn, being pulled out of fabric. Polyester woven fabrics were used to conduct the pull-out tests. Yarn pull-out crimp extension depends on sample dimensions, fabric density, fabric weave, crimp ratio and the number of pulled ends in the fabric. Results showed that multiple and single yarn pull-out crimp extensions of long samples were higher than those of short samples, and the multiple yarn pull-out crimp extension was higher than that of the single-yarn pull-out force, and the crimp extensions in fabrics were proportional to their crimp ratios. Satin fabric weave showed high weft directional single and multiple pull-out crimp extension compared to plain and ribs fabric weaves. The developed regression model may be helpful for the design of multifunctional fabrics in technical textile applications.