The majority of home filter machines in the UK will take a simple flat bottomed 4 cup cone paper coffee filter (also know as a size 4, or 4K).
In general for each size you can use 20 grams of coffee, which will produce up to 300ml of brewed coffee eg 2 cup machine produce about 600ml, and 4 cups top out at around 1.25 to 1.5 litres.
Your machine may describe itself as 12 to 15 cups: this refers a cup of about 100ml, and not full mugs. For such a machine use a 4 cup filter.
|Filter Machine||1 Cup Filter||2 Cup Filter||3 Cup Filter||4 Cup Filter|
|Melitta Aromafilter 1 x 2||✔|
|Melitta Aromafilter 1 x 4||✔||✔|
|Clever Dripper (L)||✔||✔||✔|
Aroma Filter Machines
|Russel Hobbs Filter Coffee Makers||✔|
|Morphy Richards Filter Coffee Maker||✔|
|Philips Filter Coffee Makers||✔|
|Melitta Aromaboy Filter Coffee Makers||✔|
|Cuisinart 2 Cup Filter Coffee Makers||✔|
|Most other Cuisinart Filter Coffee Makers||✔|
|Technivorm "One Cup" Filter Coffee Machine||✔|
|De'Longhi Filter Coffee Makers||✔|
Bleached/White or Unbleached/Brown Papers: which is better?
This is largely up to you. There subtle taste differences to be found but opinions do vary, and it is probably best forming your own. Certainly brown papers are more environmentally friendly.
There are also some exciting options to consider in the Melitta Gourmet range, with papers that offer more intense, or more mild, or more organic options depending on your tastes.