The aim of this paper is to analyze effective shear strength parameters measured with triaxial tests on remolded sand soils specimens with 50mm e 38mm diameters. A laboratory testing campaign of twenty-one consolidated undrained (CU) tests were carried out on remolded specimens. Those triaxial tests were performed applying confining pressures of 100, 200, and 300 kPa. The results indicated that the angle of internal friciton of the 50mm e 38mm specimens presented the value of 33º and 29º.While the results for the cohesion intercept presented values of 18,25 and 68,12 kPa. Analyzing the results that were obtained on this study, it is possible to indicate that the variation of the specimen diameter can influence on effective shear strength parameters. The results show that the specimen diameter influence on effective shear strength parameters for triaxial tests on different diameters specimens is small regarding the internal friction angle. On the other hand, soil cohesion presented a significant variation.