rows 1: { grid-rows: 1 a b c d e f g } columns 1: { grid-columns: 1 a b c d e f g } rows 2: { grid-rows: 2 a b c d e f g } columns 2: { grid-columns: 2 a b c d e f g } rows 2 columns 2: { grid-rows: 2 grid-columns: 2 a b c d e f g } columns 2 rows 2: { grid-columns: 2 grid-rows: 2 a b c d e f g } rows 3 columns 3: { grid-rows: 3 grid-columns: 3 a b c d e f g } columns 3 rows 3: { grid-columns: 3 grid-rows: 3 a b c d e f g } rows 3: { grid-rows: 3 a b c d e f g } columns 3: { grid-columns: 3 a b c d e f g } widths heights: { grid-rows: 3 grid-columns: 3 a w200.width: 200 b h300.height: 300 c d h200.height: 200 e f w400.width: 400 g h i }