When determining the size of chess board square that will work best for your chess pieces you need to consider both the height of the pieces and the base diameter of the largest piece which is usually the king. Tall pieces with a narrow base will require squares based on the height rather than the base so there is sufficient space for moving the pieces during a game. Short pieces with a wide base will need a square size based on the base more so than the height. It's really just a matter of common sense and what you like best. Some players like the look of a tight board while other players prefer the pieces widely spaced out for a better view of the board. Use the chart below as a general guideline to determine what size of chess board you need for your pieces.
| King Height | Max. King Base | Chess Board Square Size |
| 2" | .75" | 1" - 1.2" |
| 2.5" | 1" | 1.2" - 1.5" |
| 2.75" | 1.25" | 1.5" 1.75" |
| 3" | 1.375" | 1.625" - 1.75" |
| 3.25" | 1.5" | 1.75" - 2" |
| 3.5" | 1.625 | 1.875" - 2.125" |
| 3.75" | 1.625 | 2" - 2.25" |
| 4" | 1.75" | 2.25" 2.375" |
| 4.25" | 1.75" | 2.25" - 2.375" |
| 4.4" | 2" | 2.375" - 2.5" |
| 4.5" | 2.25" | 2.5" |
| 5" | 2.375" | 2.5" - 2.75" |
| 6" | 2.5" | 2.75" |