Copolymerization of styrene and divinylbenzene has been carried out in suspension, in the presence of poly(vinyl acetate) of three molecular weights (41,306, 118,600, and 216,000), in order to prepare macroreticular copolymers which possess large and very large pore sizes. The copolymer beads have specific surface areas less than 10.0 m2/g and average pore radii of 75,000 nm. By means of scanning electron microscopy and Hg-porosimetry, the bead structure was proved to be porous, being formed from the agglomerations of microparticles with large void volumes. According to the Hg-porosimetry analyses, the pore size distributions depend on the synthesis parameters.