This document presents a study that aimed to identify key attributes of freight logistics service quality and examine how these attributes impact shippers' selection of third-party logistics service providers. The researchers conducted a survey and interviews with shippers and logistics providers in Thailand. Through statistical analysis of the results, they identified 24 freight logistics service attributes that were categorized into six dimensions: reliability, assurance, tangibility, empathy, responsiveness, and cost. The study found that freight logistics service quality significantly impacts shippers' selection of third-party logistics providers, with reliability, assurance, and cost being most important.