The Mycelium Boxes have the following dimensions:

 

Standard 1200cc Grow Kits

 Regular Mycelium 1200cc
SideLBH
Carton200mm150mm80mm
Box190mm130mm75mm
 
 XL Mycelium 2100cc
 SideLBH
Carton205mm205mm120mm
Box195mm195mm80mm