Which cube size should you take: 22, 25, 26, or 27 mm?
The lounge and retail standard is 25 mm (C25), and it is the safe first order. Deep-chambered heat management devices do better on 26 or 27 mm (C26, C27), which hold heat beyond 110 minutes without a third cube. The 22 mm cube (C22) suits small phunnel bowls and markets that price by the cube rather than by the kilo. All four come off the same line, so a brand can carry two sizes with identical ash colour and odour.
