Purpose: Anti-Embolic Stockings (AES) are a valuable means of thromboprophylaxis but it is unclear whether knee or thigh length AES are more effective. The aim of this evidence-based practice activity was to compare knee and thigh length AES after a surgical operation and to examine the effects of each stockings. Methods: RISS, KISS, KoreaMed, PubMed, Ovid and The Cochrane Library were searched to identify relevant original articles. As a result, there was no difference in the prevention of Deep Vein Thrombosis (DVT) between the two groups. But since there is uncertainty, we conducted a non-randomized controlled clinical trial. Data were collected from June, 2013 to September, 2013. Survey and observational data were collected on 57 patients who agreed to participate in the study. Results: There was no difference between knee versus thigh length antiembolic stocking groups in the surrogate outcomes including calf edema, Homan s sign, leg pain of numerical rating scale(NRS) 5 or more, hot flashes leg, and color change in applied site of stocking. And skin complications did not occur in both groups. Conclusion: Knee length AES should be regarded as the stockings of choice for the prevention of DVT in surgical patients. Indeed, they have similar effectiveness as thigh length AES but with better tolerability and lower cost.