Fits most sink drains strainer, outer diameter:11 cm/ 4.3 inch, inner filter: 7 cm/2.8 inch, 3.8 cm/1.5 inch depth, micro-perforation: 3mm dia holes. Silicone Drain Cover | Living SocialFits most sink drains strainer, outer diameter:11 cm/ 4.3 inch, inner filter: 7 cm/2.8 inch, 3.8 cm/1.5 inch depth, micro-perforation: 3mm dia holes. Silicone Drain Cover | Living Social