@ddsys/material/src/styles/logo.js

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export default function(theme) {
  const { variables } = theme;
  const { logo } = variables;

  return {
    small: {
      width: logo.width * 0.5,
      height: logo.height * 0.5
    },
    normal: {
      width: logo.width,
      height: logo.height
    },
    large: {
      width: logo.width * 1.5,
      height: logo.height * 1.5
    }
  };
}