silicone mold cube 6" Large with support shell. The shell is needed for the ideal shape geometry of the finished product Size: 15cm х 15cm х H10cm(6in х 6in х 6in) Inner size: 12.5cm х 12.5cm х 12.5cm(5in х 5.1in х 5in) Wall thickness: 1.2cm (0.47in) For this cube the ideal is the square XLarge Tray https://www.amazon.com/dp/B07HG99YNP Manufactured from highest quality silicone. The color of silicone may vary. Suitable for use with concrete, plaster, resin, wax, clay, polymer clay, soap, candle.