Designed this in OpenScad to go along with BigBadBison's Spiral Chess Set https://www.thingiverse.com/thing:470700. Each square is 45mm x 45mm. Assembly is snap-together, no glue needed, but could (perhaps, should) be used if you're planning on moving this around a lot.

Parts to be printed (quantity needed for each color) 2 CornerChessBoardTile 12 EdgeChessBoardTile 18 CenterChessBoardTile

Locking rings (that hold the tiles together) can be printed in any color, as they don't show, a total of 112 of them are needed.

I've included the OpenScad file if you need to re-scale to match your chess pieces.