Our 6" tall window boxes are made from high-quality 400gsm paperboard and gloss coated. 
These come flat base with PVC window lid.
 
Our 6'' tall window box range available in square and rectangle shaped boxes.
SQUARE:
8"x8''x6'' (L:20.3cm x W:20.3cm x H:15.3cm)
10''x10''x6'' (L:25.4cm x W:25.4cm x H:15.3cm)
12"x12''x6'' (L:30.5cm x W:30.5cm x H:15.3cm)
14"x14''x6" (L:35.5cm x W:35.5cm x H:15.3cm)
16"x16''x6" (L:40.6cm x W:40.6cm x H:15.3cm)

RECTANGLE:
12''x18''x6'' (L:30.5cm x W:46cm x H:15.3cm)