Polymer blend with at least two different copolymer components, comprising: (a) at least one styrene copolymer A selected from the group consisting of styrene acrylonitrile copolymers (SAN), styrene acrylonitrile maleic anhydride terpolymers (SMA), styrene acrylic copolymers, acrylonitrile butadiene styrene terpolymers (ABS), acrylonitrile butadiene styrene terpolymers with polyamide (ABS/PA), and acrylonitrile styrene acrylate terpolymers (ASA); (b) at least one copolymer B selected from the group consisting of styrene-butadiene block copolymers (SBC) and styrene-isoprene block copolymers (SIS); (c) optionally at least one additive C; characterized in that the polymer blend comprises: (a) 89.0 to 99.5 wt-% of the at least one styrene copolymer A; (b) 0.5 to 4.5 wt-% of the at least one copolymer B; and (c) 0 to 5.0 wt.-% of the at least one additive C; wherein the wt.-% are referring to the complete polymer blend, and wherein the mold shrinkage of the polymer blend is reduced by at least 5% compared to the mold shrinkage of the pure styrene copolymer A and corresponds to the relative mold shrinkage , and wherein the relative mold shrinkage is calculated by dividing the absolute mold shrinkage of the polymer blend by the absolute mold shrinkage of the pure styrene copolymer A, the result being multiplied by a factor of 100 as follows: relative shrinkage % = 100 * absolute shrinkage example / absolute shrinkage baseline sample wherein the absolute shrinkage is determined by measuring the length of the mold and the length of the injection molded color plaque and calculated as follows: absolute shrinkage % = 100 * length of the mold − length of the part / length of the mold . (a) at least one styrene copolymer A selected from the group consisting of styrene acrylonitrile copolymers (SAN), styrene acrylonitrile maleic anhydride terpolymers (SMA), styrene acrylic copolymers, acrylonitrile butadiene styrene terpolymers (ABS), acrylonitrile butadiene styrene terpolymers with polyamide (ABS/PA), and acrylonitrile styrene acrylate terpolymers (ASA); (b) at least one copolymer B selected from the group consisting of styrene-butadiene block copolymers (SBC) and styrene-isoprene block copolymers (SIS); (c) optionally at least one additive C; (a) 89.0 to 99.5 wt-% of the at least one styrene copolymer A; (b) 0.5 to 4.5 wt-% of the at least one copolymer B; and (c) 0 to 5.0 wt.-% of the at least one additive C; wherein the wt.-% are referring to the complete polymer blend, and wherein the mold shrinkage of the polymer blend is reduced by at least 5% compared to the mold shrinkage of the pure styrene copolymer A and corresponds to the relative mold shrinkage , and wherein the relative mold shrinkage is calculated by dividing the absolute mold shrinkage of the polymer blend by the absolute mold shrinkage of the pure styrene copolymer A, the result being multiplied by a factor of 100 as follows: relative shrinkage % = 100 * absolute shrinkage example / absolute shrinkage baseline sample wherein the absolute shrinkage is determined by measuring the length of the mold and the length of the injection molded color plaque and calculated as follows: absolute shrinkage % = 100 * length of the mold − length of the part / length of the mold . <EOS>