Composters
To work out the appropriate size for your needs, the best thing is to measure your waste output over a typical week and compare with the capacities given below. If you are unsure, go for the JK 270. There is no harm in having additional capacity.
Note that the machines are delivered flat-packed (like all things Swedish!) but are not difficult to assemble.
The JK 125 / 270 is particularly valuable in schools as an educational tool.

JK 125
Dimensions:
950 x 836 x 836 mm (38 " x 33" x 33") overall with stand
Weight (empty):
29 kg
Volume:
125 litres
Capacity:
12 litres or 6kg per week
Suitable for:
Smaller households (4 to 6 people - but could be less, depending on how much waste is generated)
£305.50 Inc VAT and Shipping (UK only)

JK 270
Dimensions:
1160 x 886 x 886 mm (46" x 35" x 35") overall with stand
Weight (empty):
38 kg
Volume:
270 litres
Capacity:
30 litres or 15kg per week
Suitable for:
Larger households. Guest houses, small restaurants, day nurseries, care homes, etc., (depending on how much waste is generated, these establishments could consider having more than one unit)
£397.46 Inc VAT and Shipping (UK only)