Thermoplastic resin composition

A thermoplastic resin composition comprising:

• a graft copolymer, and
• a non-grafted copolymer,
• wherein the graft copolymer includes:
• a rubber polymer having an average particle diameter of from 250 to 450 nm and including a first styrene-based monomer unit and a diene-based monomer unit in a weight ratio of 10:90 to 35:65,
• a (meth)acrylate-based monomer unit grafted onto the rubber polymer, and
• a second styrene-based monomer unit grafted onto the rubber polymer;
• wherein the non-grafted copolymer includes:
• the (meth)acrylate-based monomer unit, and
• the second styrene-based monomer unit;
• wherein a weight ratio of the (meth)acrylate-based monomer unit, which is all of the (meth)acrylate-based monomer units included in the thermoplastic resin composition, to the second styrene-based monomer unit, which is all of the second styrene-based monomer units included in the thermoplastic resin composition, is 2 or less;
• and
• wherein the thermoplastic resin composition has a weight-average molecular weight of from 130,000 to 250,000 g/mol.