In the present work, the fabrication of porous silver through the dealloying of Ag24.3Zn75.7, Ag33.4Zn66.6, and Ag57.6Zn42.4 alloys in dilute H2SO4 solution is reported. Different length scales and distribution could be achieved through varying the alloy's composition and concentration of H2SO4 solution. Multi-porosity distribution of Ag33.4Zn66.6 alloy also indicates the possibility to tailor the microfilter's structure by using common microstructure controlling method in materials science.