Sizes

15cm (6") diameter, approx 15cm (6") high. Suggested uses: bedside/nightstand lights, pendant light for fittings that have more than one shade.
20cm (8") diameter, approx 18cm (7") high. Suggested uses: small standard/table lamps, ceiling/pendant light for very small rooms.
25cm (10") diameter, approx 20cm (8") high. Suggested uses: medium standard/table lamps, ceiling/pendant light for small or medium sized rooms.
28cm (11") diameter, approx 21cm (8.5") high. Suggested uses: Medium sized USA harp style standard/table lamps.
30cm (12") diameter, medium/large shade approx 21cm (8.5") high. Suggested uses: medium-large standard/table/floor lamps, ceiling/pendant light for medium or large sized rooms. This size is the most popular and tends to suit most sizes of rooms and lamps.